Doc #34 — Lubricant Production from NZ Materials

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RECOMMENDED ACTIONS

Phase 1 — First months (Months 0–6)

1. Inventory all lubricant stocks nationally — include distributor warehouses, retail, farm stocks, industrial maintenance stores, vehicle sumps. Classify by type: engine oil, hydraulic fluid, gear oil, grease by NLGI grade, specialty lubricants. Include this in the national asset census (Doc #8) and consumables requisition (Doc #1).

2. Classify transformer oil as a protected strategic reserve — no diversion to other applications. Transformer oil cannot be substituted and transformers cannot function without it (Doc #65, Doc #69).

3. Implement priority allocation for petroleum lubricants:

   • Priority 1: Hydro station bearings and hydraulic systems, transformer oil
   • Priority 2: Essential vehicle fleet engine oil
   • Priority 3: Machine tool spindle bearings and precision equipment
   • Priority 4: Farm machinery engine oil and heavy-duty hydraulics
   • Priority 5: All other applications — switch to bio-lubricants immediately

4. Begin producing calcium grease (tallow-lime) at rendering plants — issue production guidance to NZ’s rendering facilities. The process requires rendered tallow, hydrated lime from NZ limestone (Doc #112), a steel mixing vessel, and a heat source — all available domestically. Production can commence within weeks at facilities that already handle tallow.

5. Switch all non-critical lubrication to bio-lubricants immediately — hand tools, open gears, chains, low-speed bearings, workshop applications. Preserve petroleum products for applications that require them.

6. Issue lubricant guidance to farmers through Federated Farmers channels — which applications can use tallow/grease, which must conserve petroleum oil.

Phase 1–2 — First year (Months 0–12)

7. Begin controlled testing of canola oil as hydraulic fluid in non-critical systems. Document performance, change intervals, seal condition, and failure modes. Build the data needed for eventual deployment in critical systems.

8. Establish lanolin refining for lubricant grade at NZ wool scouring plants (Hawke’s Bay, Canterbury, Timaru). Pilot production runs with quality testing.

9. Source castor seed stock — from NZ ornamental plantings, Australian nurseries (if early trade allows), or Pacific Island contacts. Begin trial plantings in Northland and Bay of Plenty even if nuclear winter conditions are uncertain.

10. Develop sulfurised tallow cutting oil using geothermal sulfur — partner with machine shops (Doc #91) for testing in metalworking applications.

11. Survey graphite sources in NZ — map available graphite from industrial scrap (motor brushes, batteries, pencils) and assess natural deposits. Establish grinding/processing capability for graphite powder.

12. Expand canola cultivation as part of agricultural planning (Doc #76) — allocate additional Canterbury and Southland arable land to canola, balancing against food crop priorities.

Phase 2–3 — Years 1–5

13. Scale up grease production to meet national demand — regional production hubs at rendering plants, with standardised quality control.

14. Deploy bio-lubricants in progressively higher-criticality applications as testing data accumulates — move from non-critical to moderate-criticality based on demonstrated performance.

15. Establish castor oil production as climate conditions allow. Even small quantities are high-value for precision bearing lubrication.

16. Develop hydraulic system conversion — begin engineering work to replace hydraulic actuators with electric or mechanical alternatives on critical equipment, reducing total hydraulic fluid demand.

17. Prioritise lubricant base oils as a trade commodity — when sail trade with Australia develops (Doc #141), petroleum lubricant base oils should be a priority import item.

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1. NZ’S CURRENT LUBRICANT SUPPLY

1.1 Import volumes

NZ imports petroleum lubricants as finished products and base oils. Based on Stats NZ trade data and industry estimates, NZ’s total lubricant consumption is approximately 80,000–100,000 tonnes per year, covering all sectors: automotive, industrial, agricultural, marine, and aviation.¹ Major suppliers include ExxonMobil (Mobil brand), BP (Castrol), Shell, Fuchs, and Penrite, distributing through retail (Supercheap Auto, Repco), service stations, rural suppliers (Farmlands, PGG Wrightson), and direct industrial supply.

NZ has no lubricant base oil refinery. The Marsden Point refinery (now operating as an import terminal since refining ceased in 2022) processed crude oil but its lubricant base oil output was limited even when operational.² Virtually all lubricant base stocks are imported.

1.2 In-country stocks

At any given time, NZ holds lubricant stocks across the distribution chain:

• Distributor warehouses: Major distributors hold weeks to a few months of normal supply
• Retail and trade outlets: Smaller volumes across thousands of outlets
• Farm and industrial stocks: Individual holdings on farms, in factory maintenance stores, in workshop stocks
• Vehicle engine oil: NZ’s approximately 4.2–4.5 million registered vehicles each contain 3–8 litres of engine oil, totalling roughly 15–25 million litres in situ³

Total in-country stock estimate: Difficult to quantify precisely without the national asset census (Doc #8). A rough estimate based on distribution chain depth is 15,000–30,000 tonnes of finished lubricant products across all categories, plus oil already in machinery. This figure is uncertain and should be verified through the requisition inventory (Doc #1).

1.3 Depletion under rationed use

Normal consumption of ~80,000–100,000 tonnes per year is driven largely by the automotive sector (engine oil changes, gear oil, transmission fluid), which will collapse under fuel rationing (Doc #53). With 85–95% of vehicles mothballed (based on the fuel rationing assumptions in Doc #53), automotive lubricant consumption drops to perhaps 10–15% of normal. Industrial, agricultural, and infrastructure lubricant use continues but at reduced levels as activity contracts.

Estimated rationed consumption: 10,000–20,000 tonnes per year, concentrated in:

• Essential vehicle fleet engine oil and transmission fluid
• Farm machinery (tractors, milking equipment, hydraulics)
• Hydro station turbine bearings and gate mechanisms (Doc #65)
• Machine shop equipment (Doc #91)
• Pumps, motors, and general mechanical equipment

At this rate, in-country stocks of 15,000–30,000 tonnes could last roughly 1–3 years. Some products (specialist hydraulic fluids, high-performance gear oils) will deplete faster than general-purpose lubricants because their stocks are smaller and alternatives harder to find.

1.4 Urgency assessment

Lubricant supply is not an immediate crisis. Unlike fuel (which needs rationing within days), lubricant consumption under fuel rationing drops automatically as most vehicles stop running. The main risk is not that lubricants will run out before substitutes are available, but that specific high-performance lubricants for critical applications (hydro turbine bearings, precision machine tools, hydraulic systems) will deplete before adequate substitutes have been tested and deployed. The correct Phase 1 actions are inventory (know what you have), controlled allocation (prioritise critical applications), and experimental programs (begin testing bio-lubricant substitutes in non-critical applications immediately, to build data for later deployment in critical ones).

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2. TALLOW-BASED LUBRICANTS

2.1 NZ tallow production

NZ’s meat processing industry is substantial. With approximately 6.3 million dairy cattle, 3.9 million beef cattle, 25.5 million sheep, and 830,000 deer (Doc #74), the rendering industry that processes slaughter byproducts generates significant tallow (beef and mutton fat) output.⁴

NZ produces approximately 100,000–150,000 tonnes of tallow and other rendered animal fats per year under normal conditions.⁵ Most of this is exported — NZ is one of the world’s larger tallow exporters, primarily to Southeast Asian markets for biodiesel and oleochemical production. Under recovery conditions, all of this tallow becomes available for domestic use.

Assumption: Even under nuclear winter with reduced livestock numbers (Doc #74 estimates stocking rate reductions of 30–50% may be necessary), NZ tallow production would likely remain in the range of 50,000–100,000 tonnes per year. This far exceeds the lubricant requirement. Tallow will simultaneously be in demand for soap (Doc #37), candles (Doc #46), biodiesel (Doc #57), food (cooking fat), and leather treatment (Doc #101). Allocation among competing uses is a planning question, not a scarcity problem.

Tītī (muttonbird/sooty shearwater) fat: In Murihiku (Southland) and coastal Otago, rendered tītī fat is a traditional product with properties relevant to lubricant use — it is high in unsaturated fatty acids, giving it a significantly lower pour point than beef tallow.⁶ This makes it a better cold-weather lubricant base than standard tallow for small-scale applications. Communities with established tītī harvesting traditions hold knowledge of fat rendering and storage that is directly applicable to animal-fat lubricant production. Quantities are modest compared to livestock tallow but the lower pour point is a useful property for specific applications.

The primary NZ rendering companies include Talleys, Wallace Corporation (Canterbury), and rendering operations integrated into major meat processors (Silver Fern Farms, ANZCO Foods, Alliance Group).⁷ These facilities have existing infrastructure for tallow production — tanks, presses, filtering equipment, and storage.

2.2 Tallow properties as a lubricant

Tallow has been used as a lubricant for thousands of years, predating petroleum by millennia. Its basic properties:⁸

Property	Beef Tallow	Typical Mineral Oil (ISO VG 68)
Kinematic viscosity at 40°C	35–45 mm²/s (when melted)	61–74 mm²/s
Kinematic viscosity at 100°C	7–9 mm²/s	8–9 mm²/s
Pour point	35–45°C	-15 to -30°C
Flash point	200–250°C	200–250°C
Viscosity index	150–200	90–110
Oxidation stability	Poor without additives	Good with additive package
Lubricity (film strength)	Excellent	Good
Biodegradability	High	Low

Several properties are notable:

High pour point: Tallow solidifies at 35–45°C — it is a solid fat at room temperature. This is simultaneously an advantage (excellent as a grease base) and a limitation (cannot function as a flowing oil in cold conditions without blending or modification). For a liquid lubricant, tallow must be heated above its melting point or blended with a lower-melting-point oil.

Excellent film strength (lubricity): Tallow’s polar fatty acid molecules adhere strongly to metal surfaces, forming a tenacious boundary lubricant film. This is why tallow was historically the preferred cutting fluid for metalworking (Doc #91 notes this) and remains an excellent boundary lubricant for low-speed, high-load applications.⁹

High viscosity index: Tallow’s viscosity changes less with temperature than petroleum oils — a desirable property. When liquid, it maintains viscosity better at high temperatures.

Poor oxidation stability: Tallow oxidises (goes rancid) when exposed to air and heat. Oxidised tallow becomes acidic, gummy, and corrosive — damaging to the surfaces it is meant to protect. This is the most significant limitation for enclosed systems where oil changes are infrequent.¹⁰

2.3 Applications where tallow works well

Open gears and chains: Tallow, applied solid or melted, provides excellent lubrication for open gears, roller chains, wire ropes, and similar exposed mechanisms. Oxidation is less relevant because the lubricant is consumed and reapplied regularly. Historically, tallow was the standard lubricant for these applications before petroleum.¹¹

Low-speed plain bearings (journal bearings): At speeds below approximately 500 RPM with moderate loads, tallow provides adequate hydrodynamic lubrication. Farm equipment bearings, gate hinges, wagon axles, and similar applications fall in this category. This is the application where tallow served for centuries before petroleum.¹²

Hand tools and woodworking: Tallow on saw blades, drill bits, hand planes, chisels, and similar tools reduces friction and prevents rust. Applied by wiping or rubbing a solid block of tallow on the tool surface.

Cutting fluid for metalworking: Tallow is an effective cutting lubricant, particularly for threading and tapping operations (Doc #91). It outperforms many petroleum cutting fluids in boundary lubrication (high-pressure, low-speed contact at the tool-chip interface).¹³

Wire drawing and metal forming: Tallow was the historical lubricant for wire drawing (Doc #105), deep drawing, and stamping operations. Its strong boundary film reduces friction and die wear.

Tallow-based grease (see Section 6): Mixed with lime (calcium hydroxide), tallow produces calcium grease — a water-resistant general-purpose grease that was the standard industrial grease before petroleum. This is one of the most important NZ-producible lubricant products.

Leather treatment: Tallow and neatsfoot oil (a related animal fat) condition and waterproof leather (Doc #101).

2.4 Applications where tallow is marginal or fails

High-speed bearings (>1,500 RPM): Electric motor bearings, spindle bearings on machine tools, generator bearings, and similar high-speed applications generate significant heat. Tallow’s poor oxidation stability means it degrades rapidly at elevated temperatures, forming acidic residues and varnish. In fully enclosed ball bearing housings, this degradation accelerates. Petroleum greases with antioxidant additive packages are designed for this service; tallow is not.¹⁴

Precision machinery: Machine tool slideways, spindle bearings, and precision mechanisms require lubricants with consistent viscosity, low tendency to form gum or residue, and long service life between changes. Tallow’s oxidation products — sticky, acidic residues — are directly harmful to precision surfaces. Short-term use with very frequent changes (daily or more) is possible but operationally burdensome.

Engine oil: Internal combustion engines operate at temperatures of 90–120°C with oil in continuous contact with hot combustion gases. Tallow will oxidise rapidly under these conditions, forming sludge and acidic compounds that attack engine bearings and seals. Tallow is not a viable engine oil substitute, even short-term.¹⁵

Hydraulic systems (see Section 8): Hydraulic fluid must remain liquid over a wide temperature range, resist oxidation, maintain consistent viscosity, and not attack rubber seals. Tallow fails on pour point (solid at ambient NZ temperatures), oxidation stability, and seal compatibility.

Automatic transmissions: Similar to hydraulic systems — complex requirements including friction modification, seal compatibility, and thermal stability that tallow cannot meet.

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3. LANOLIN-BASED LUBRICANTS

3.1 NZ lanolin production

Lanolin is a waxy substance secreted by sheep sebaceous glands that coats wool fibres. It is recovered during wool scouring — the industrial washing of raw (greasy) wool. NZ processes a substantial proportion of the world’s wool and is a significant lanolin producer.

NZ’s sheep flock of approximately 25.5 million produces roughly 120,000–140,000 tonnes of greasy wool per year.¹⁶ Greasy wool contains approximately 5–15% wool grease (the crude precursor to lanolin), depending on breed and conditions. NZ’s wool scouring industry — concentrated at sites in Hawke’s Bay (Cavalier Bremworth/NZ Woolscouring), Canterbury (Woolyarns), and Timaru — recovers this wool grease as a byproduct of the scouring process.¹⁷

Estimated NZ wool grease production: 8,000–15,000 tonnes per year under normal conditions. Refined lanolin (pharmaceutical or cosmetic grade) is a fraction of this — perhaps 2,000–5,000 tonnes. For lubricant use, crude or partially refined wool grease is adequate, so the full production is potentially available.

Under nuclear winter with reduced sheep numbers, wool production declines proportionally, but even a 40–50% reduction would leave NZ producing several thousand tonnes of wool grease annually — far more than is needed for lubricant applications alone.

3.2 Lanolin properties as a lubricant

Lanolin is a complex mixture of wax esters, fatty alcohols, and fatty acids. Its properties are distinct from both tallow and petroleum oils:¹⁸

Property	Lanolin (anhydrous)	Petroleum Grease (NLGI 2)
Consistency	Semi-solid wax, soft and sticky	Semi-solid grease
Melting range	36–44°C	N/A (thickener-dependent)
Water resistance	Excellent — absorbs up to 200% its weight in water while maintaining lubricity19	Good to excellent
Adhesion to metal	Excellent — tenacious, resists washing off	Good
Oxidation stability	Moderate — better than tallow, worse than petroleum	Good with additives
Corrosion protection	Excellent — widely used as a rust preventive	Good
Viscosity (melted, 40°C)	25–40 mm²/s	N/A

Key properties for lubricant use:

Outstanding water resistance: Lanolin’s ability to emulsify water while maintaining its protective film makes it exceptional for marine, outdoor, and wet-environment applications. This is a genuine advantage over many petroleum lubricants.²⁰

Excellent adhesion and corrosion prevention: Lanolin forms a persistent, slightly tacky film on metal surfaces that resists displacement by water and provides long-term corrosion protection. Lanolin-based rust preventives (such as the commercial product Lanotec, produced in Australia) are recognised as premium corrosion inhibitors.²¹

Moderate oxidation stability: Better than tallow because lanolin’s wax ester structure is more resistant to oxidative attack than tallow’s free fatty acid content. Still inferior to petroleum products with synthetic antioxidants.

Self-emulsifying: Lanolin naturally absorbs water, which can be an advantage (forming a water-resistant emulsion grease) or a disadvantage (contamination of systems that need dry lubricant).

3.3 Applications where lanolin works well

Corrosion prevention and long-term storage protection: Coating metal surfaces — tools, machinery, stored equipment, firearms — with lanolin provides excellent rust prevention in NZ’s humid climate. This is arguably lanolin’s highest-value lubricant application: protecting the national stockpile of mechanical equipment from corrosion during storage.

Marine lubrication: Deck hardware, winch mechanisms, anchor chain, rigging fittings (Doc #138). Lanolin’s water resistance makes it superior to tallow for marine applications.

Exposed bearings in wet environments: Farm gate hinges, fencing equipment, outdoor mechanical linkages — any application where water ingress is expected.

Wire rope and cable lubrication: Penetrates wire rope strands and provides both lubrication and corrosion protection.

Blending base for compound lubricants: Lanolin can be blended with tallow, plant oils, graphite, or other additives to create purpose-formulated lubricants (see Section 7).

3.4 Applications where lanolin is inadequate

High-temperature applications: Like tallow, lanolin degrades at sustained temperatures above ~80–100°C. Not suitable for engine lubrication or high-speed bearings.

Flowing-oil systems: Lanolin is a semi-solid wax at ambient temperatures. It cannot substitute for flowing liquid lubricant in circulating oil systems, splash lubrication systems, or any application requiring oil to flow through passages and return to a reservoir.

Seal compatibility: Lanolin’s composition may attack some rubber seal materials, particularly nitrile rubber (NBR) commonly used in hydraulic and pneumatic seals. Compatibility testing is required before use in sealed systems.²²

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4. CANOLA (RAPESEED) OIL

4.1 NZ canola production

NZ grows canola (a cultivar of rapeseed, Brassica napus) primarily in Canterbury and Southland. The area under canola cultivation has varied significantly with market conditions, ranging from approximately 3,000–8,000 hectares in recent years, yielding roughly 5,000–15,000 tonnes of seed (approximately 2,000–6,000 tonnes of oil after crushing).²³

This is modest relative to lubricant demand but can be expanded. Canterbury and Southland have substantial arable land that could be redirected to canola — though this competes with food crop priorities (Doc #76). Canola is also a useful rotation crop that breaks disease cycles in cereal-dominated rotations, and can be grown alongside legumes whose nitrogen fixation benefits the overall system.

Under nuclear winter conditions, canola — as a cool-season crop that tolerates lower temperatures better than many alternatives — may actually be relatively well-suited. Yield reductions under nuclear winter are uncertain but canola is grown commercially in Scandinavian and northern European climates that approximate some nuclear winter temperature regimes for NZ.²⁴

NZ crushing capacity: NZ has oilseed crushing facilities, including operations at Ashburton (Midlands Seed) and other Canterbury locations, though total capacity is limited compared to Australian or North American operations.²⁵ Expansion of crushing capacity would require additional press or solvent extraction equipment — pressing is feasible with NZ-fabricable screw presses; solvent extraction requires hexane (petroleum-derived, finite supply).

4.2 Canola oil properties as a lubricant

Canola oil is a liquid vegetable oil with properties that make it the most promising NZ-produced substitute for petroleum lubricating oil in applications requiring a flowing liquid:²⁶

Property	Canola Oil	Typical Mineral Oil (ISO VG 32)
Kinematic viscosity at 40°C	35–40 mm²/s	28.8–35.2 mm²/s
Kinematic viscosity at 100°C	8–9 mm²/s	5–6 mm²/s
Pour point	-15 to -25°C	-15 to -30°C
Flash point	275–290°C	200–230°C
Viscosity index	190–210	95–110
Oxidation stability (RPVOT)	Poor (30–60 min)	Good (200+ min with additives)
Lubricity (film strength)	Good to excellent	Good

Key advantages:

Liquid at NZ ambient temperatures: Canola oil remains liquid well below 0°C, making it the only NZ-produced bio-lubricant that can function as a flowing oil in circulating systems, splash lubrication, and applications requiring oil to be poured or pumped at ambient temperatures. This is critically important.²⁷

High viscosity index: Canola oil’s viscosity changes less with temperature than petroleum oils — it is thinner at low temperatures and relatively thicker at high temperatures compared to mineral oils of similar viscosity. This is a desirable property.

Excellent lubricity: Like all vegetable oils, canola oil’s polar ester molecules provide strong boundary lubrication, often outperforming mineral oils under boundary conditions.

Key limitations:

Poor oxidation stability: This is canola oil’s most serious limitation. Without antioxidant additives, canola oil oxidises readily at temperatures above ~60°C, forming polymeric deposits (varnish), increasing in viscosity, and becoming acidic. In enclosed systems operating at elevated temperatures, canola oil’s service life is a fraction of petroleum oil’s — perhaps weeks rather than months or years.²⁸ This is the fundamental barrier to using canola oil as a direct engine oil or hydraulic fluid substitute.

Polymerisation: At high temperatures, canola oil polymerises — thickening into a gummy, varnish-like residue. This clogs oil passages, coats bearings, and can cause catastrophic failure in engines and hydraulic systems.²⁹

4.3 Applications where canola oil works

Low-temperature lubrication: Equipment operating below ~40°C where a flowing liquid lubricant is needed — chainsaw bars, bicycle chains, sewing machines, light-duty mechanisms, locks, light-load journal bearings.

Total-loss lubrication systems: Systems where oil is applied and consumed (not recirculated) — saw guides, chain lubrication, drip oilers on slow equipment. Oxidation stability matters less when oil is continuously replaced.

Two-stroke engine oil (blended): Canola oil can substitute for two-stroke mixing oil where it is burned with the fuel rather than recirculated. Performance is inferior (more deposits) but functional for non-critical applications.³⁰

Hydraulic fluid — with major caveats (see Section 8): Canola oil can serve as hydraulic fluid in low-temperature, low-duty-cycle systems if changed frequently. This is discussed in detail in Section 8.

Cutting fluid base: Emulsified with water and soap, canola oil creates a usable cutting fluid for metalworking.

4.4 Applications where canola oil fails

Engine oil: Temperatures too high, service intervals too long. Polymerisation and oxidation will cause engine failure within weeks to months under normal engine operating conditions without additive packages that NZ cannot produce.³¹

High-temperature hydraulics: Tractor hydraulic systems, industrial presses, and other high-duty-cycle hydraulic equipment routinely reach 60–90°C. Canola oil degrades rapidly at these temperatures.

Long-service-interval applications: Any enclosed system where oil changes occur less than weekly under load. Canola oil does not have the oxidative life for long service intervals.

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5. CASTOR OIL

5.1 Castor cultivation potential in NZ

Castor oil comes from the castor bean plant (Ricinus communis), a tropical to subtropical species not commercially grown in NZ. However, castor is adaptable and has been grown experimentally in warm NZ regions. It is cultivated commercially at latitudes comparable to northern NZ (northern New South Wales in Australia, southern US states, Mediterranean Europe).³²

NZ suitability: Castor requires a frost-free growing season of at least 140–180 days and warm temperatures (optimal 20–30°C). In NZ, this limits viable cultivation to Northland, Auckland, Bay of Plenty, and coastal Hawke’s Bay under normal conditions. Under nuclear winter (-5°C average cooling), even these regions may be marginal — castor is frost-sensitive and a 5°C temperature reduction could make NZ cultivation impractical until temperatures recover (Phase 3–4).³³

Timeline to production: Even under favourable conditions, establishing castor cultivation requires: seed sourcing (NZ has no commercial castor seed stocks — seed would need to come from existing ornamental plantings or Australian/Pacific imports via early trade), trial growing seasons (2–3 years minimum to establish viable varieties and agronomic practice for NZ conditions), and crushing/extraction infrastructure. Realistic timeline to meaningful castor oil production: 3–7 years from the event, possibly longer under nuclear winter conditions.

Potential production scale: If 1,000–3,000 hectares were dedicated to castor in Northland and Bay of Plenty (a significant land allocation competing with food production), yields of 1–2 tonnes/hectare might produce 1,000–6,000 tonnes of castor oil per year. This is modest but significant for high-value lubricant applications.³⁴

5.2 Castor oil properties

Castor oil has unique properties that make it exceptionally valuable as a lubricant — properties that no other NZ-producible oil can match:³⁵

Property	Castor Oil	Typical Mineral Oil (ISO VG 68)
Kinematic viscosity at 40°C	220–260 mm²/s	61–74 mm²/s
Kinematic viscosity at 100°C	18–20 mm²/s	8–9 mm²/s
Pour point	-18 to -25°C	-15 to -30°C
Flash point	270–290°C	200–250°C
Viscosity index	80–90	90–110
Film strength	Exceptional	Good
Solubility in alcohol	Soluble	Insoluble

Why castor oil is special:

Very high viscosity: Castor oil is far more viscous than other vegetable oils — roughly 5–7 times the viscosity of canola oil. This makes it suitable for applications requiring thick oil films: gear lubrication, high-load bearings, and applications where thinner oils would be squeezed out of the contact zone.³⁶

Outstanding film strength: Castor oil’s ricinoleic acid content (approximately 85–90%) gives it exceptional boundary lubrication properties.³⁷ The hydroxyl group on the ricinoleic acid molecule provides polar adhesion to metal surfaces that exceeds even other vegetable oils.

High-speed bearing capability: Castor oil was the standard lubricant for high-speed rotary aircraft engines in WWI and remained in use for racing engines well into the petroleum era. It tolerates the high shear rates and temperatures in high-speed bearings better than other biological lubricants — though still not as well as modern synthetic petroleum lubricants.³⁸

Alcohol solubility: Castor oil dissolves in ethanol — unlike petroleum oils. This property enables formulation of fuel-lubricant blends for two-stroke engines using ethanol-based fuel, a potentially important application if NZ develops ethanol fuel production (Doc #51).

Oxidation stability: Better than canola oil or tallow but still inferior to petroleum oils with additive packages. Castor oil does polymerise at high temperatures, but more slowly and with less destructive residue than canola oil.

5.3 Applications where castor oil excels

High-speed bearings: The closest NZ-producible substitute for petroleum bearing oils in applications above 1,500 RPM. Electric motor bearings, generator bearings, machine tool spindle bearings — the applications that tallow and canola oil cannot serve. Service life will still be shorter than petroleum equivalents, requiring more frequent oil changes.

Gear lubrication: High viscosity and exceptional film strength make castor oil suitable for gear sets, including moderately loaded enclosed gear drives.

Two-stroke engine lubricant: Castor oil has a long history as two-stroke oil (hence the racing brand “Castrol” — derived from “castor oil”).³⁹ If NZ operates two-stroke engines (chainsaws, small generators, outboard motors), castor oil is an effective lubricant.

Racing and high-performance applications: Where maximum lubrication performance is needed for short durations — test engines, prototype equipment, situations where frequent rebuilds are accepted.

5.4 Strategic importance

Castor oil is the single most valuable lubricant feedstock NZ could produce domestically, because it addresses the applications where other bio-lubricants fail — high-speed bearings and precision machinery. The inability to produce castor oil immediately is a genuine vulnerability. Early action to secure seed stock and begin trial plantings (even acknowledging that nuclear winter may delay viable production) is warranted.

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6. GREASE PRODUCTION

6.1 Why grease matters

Grease is the primary lubricant for most bearing applications — sealed ball bearings, wheel bearings, chassis fittings, electric motor bearings. Most of the lubrication points on NZ’s mechanical equipment use grease, not oil. The ability to produce grease locally is arguably more important than producing liquid lubricant oil, because grease serves more lubrication points.

A grease is a semi-solid lubricant consisting of a base oil (which provides the actual lubrication), a thickener (which holds the oil in a solid or semi-solid matrix), and additives (which enhance performance). The thickener is what makes grease stay in place rather than flowing away like oil.⁴⁰

6.2 Calcium (lime) grease from tallow

The simplest NZ-producible grease is calcium grease — tallow thickened with hydrated lime (calcium hydroxide). This was the standard industrial grease before petroleum, and it remained in widespread use into the mid-20th century.⁴¹

Production process:

1. Render tallow from slaughter byproducts using existing rendering infrastructure. Filter to remove solids. The rendered tallow should be clean and free of water.
2. Prepare hydrated lime — calcium hydroxide, Ca(OH)₂ — from quicklime (calcium oxide). NZ produces lime commercially from limestone at Golden Bay Cement (Tākaka) and other lime works.⁴² Quicklime slaked with water produces hydrated lime.
3. Saponify: Heat tallow to 80–90°C in a suitable vessel. Add hydrated lime slowly (approximately 5–10% by weight of the tallow) while stirring continuously. The lime reacts with the fatty acids in tallow (saponification), forming calcium soap — the thickener.
4. Cook: Maintain temperature at 85–95°C while stirring for 1–2 hours until saponification is complete. The mixture thickens to a grease-like consistency.
5. Add water: Calcium grease requires a small percentage of water (1–3%) trapped in its structure to maintain its thickener matrix. Add water during cooling and stir thoroughly.
6. Cool and mill: Allow the grease to cool while continuing to stir or agitate. For uniform consistency, the finished grease should be passed through a mill or worked mechanically (kneading, stirring).

Dependency chain:

• Tallow: from NZ meat processing (available)
• Lime: from NZ limestone (available — Doc #112)
• Heat source: electricity or wood fire
• Mixing vessel: steel vessel, available from NZ fabrication (Doc #91)
• Quality control: consistency testing (cone penetration — can be improvised with standard tools)

Properties of calcium grease:

Property	Tallow-Lime Grease	Typical Lithium Grease (NLGI 2)
Consistency	NLGI 1–3 (adjustable)	NLGI 2
Operating temperature range	-10°C to 60°C	-30°C to 120°C
Water resistance	Excellent	Good
Mechanical stability	Moderate	Good
Oxidation stability	Poor to moderate	Good
High-speed bearing suitability	Poor above 1,500 RPM	Good to 10,000+ RPM

Maximum operating temperature of ~60°C is the key limitation. Above this, the calcium soap thickener loses its water of hydration and the grease collapses — losing its semi-solid structure and flowing out of the bearing. Modern lithium greases tolerate 120°C or more. This temperature ceiling excludes calcium grease from any application that runs hot: high-speed bearings, equipment in confined spaces, high-load bearings that generate frictional heat.

6.3 Sodium grease from tallow

Substituting sodium hydroxide (caustic soda, NaOH) for calcium hydroxide produces sodium-based grease, which has a higher temperature ceiling — usable to approximately 80–100°C — but poor water resistance.⁴³

Trade-off: Sodium grease extends the usable temperature range by ~20–40°C but fails in wet or outdoor environments. Suitable for enclosed, dry applications at moderate temperatures. NZ can produce caustic soda via electrolysis of salt brine (Doc #112), so the feedstock exists.

6.4 Lanolin-based grease

Lanolin, being naturally waxy and semi-solid, functions as a grease without any added thickener. It can be used directly or blended:

• Pure lanolin grease: Applied directly to bearings, fittings, and mechanisms. Good water resistance, excellent corrosion protection, moderate temperature limit (~80°C).
• Lanolin + graphite: Adding ground graphite (see Section 7.2) to lanolin produces a grease with enhanced load-bearing capacity and temperature tolerance.
• Lanolin + tallow blend: Adjusts consistency — more tallow for softer grease, more lanolin for tackier, more water-resistant grease.

6.5 Grease application guidance

Application	Recommended NZ Grease	Notes
Wheel bearings (slow speed, <60°C)	Calcium (tallow-lime)	Adequate. Change more frequently than petroleum grease.
Chassis/steering fittings	Calcium (tallow-lime)	Good fit — this was the original use case.
Electric motor bearings (moderate speed)	Sodium (tallow-NaOH) or castor-based	Higher temperature needed. Monitor closely.
High-speed spindle bearings	Castor oil-based grease (when available)	Only bio-option for >3,000 RPM. Petroleum preferred if available.
Marine/outdoor fittings	Lanolin or calcium (tallow-lime)	Lanolin preferred for corrosion protection.
Sealed ball bearings (repacking)	Sodium or calcium depending on temperature	Change intervals reduced from petroleum specifications.
Open gears	Tallow with graphite	Applied liberally and frequently.
Wire rope	Lanolin	Excellent penetration and water resistance.

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7. ADDITIVES FROM NZ MATERIALS

Petroleum lubricants contain sophisticated additive packages — antioxidants, anti-wear agents, extreme-pressure additives, corrosion inhibitors, viscosity modifiers, detergents, and dispersants — that NZ cannot produce. However, some simpler additives can be sourced from NZ materials and blended into bio-lubricants to improve their performance.

7.1 Graphite

Graphite is one of the most effective solid lubricants, providing lubrication through the shearing of its layered crystal structure. Mixed with grease or oil, graphite reduces friction and extends the load-carrying capability of bio-lubricants.⁴⁴

NZ sources: NZ has limited natural graphite deposits — small occurrences have been reported in the South Island (Westland, Otago) but none are commercially developed.⁴⁵ More practically, graphite can be recovered from:

• Pencils (graphite cores — small quantities)
• Discarded dry-cell batteries (carbon rods)
• Electrical brushes from motors (carbon-graphite)
• Eventually, pyrolysis of organic material at high temperature can produce impure graphite, though the quality is uncertain

Application: Ground to fine powder and mixed at 2–10% by weight into tallow or lanolin grease, graphite significantly improves performance on slow-speed bearings, open gears, slides, and ways. Particularly valuable for machine tool slideways (Doc #91) where the lubricant must support both low friction and accurate positioning.

Raupō pollen as a supplementary dry lubricant: Pollen from raupō (Typha orientalis, bulrush) is extremely fine and has documented dry lubricant properties — it has been investigated in tribology research as a natural dry lubricant, analogous to lycopodium powder.⁴⁶ In locations where raupō grows abundantly, harvested pollen could supplement graphite for specific light-duty dry lubrication applications, though quantities available are modest and it should be considered a niche supplement rather than a graphite replacement.

7.2 Sulfur

Sulfur is a traditional extreme-pressure additive — under high contact pressure, sulfur compounds react with the metal surface to form an iron sulfide film that prevents welding and seizure of metal surfaces.⁴⁷

NZ sources: NZ has significant sulfur deposits associated with geothermal areas — particularly the Taupō Volcanic Zone (Rotorua, Wairakei, White Island/Whakaari). Elemental sulfur can be collected from surface deposits or extracted from geothermal fluids.⁴⁸ NZ also produces some sulfur as a byproduct of geothermal power generation.

Application: Elemental sulfur dissolved in heated tallow or oil (at approximately 150°C, sulfur dissolves in animal fats — the traditional “sulfurised tallow”) creates a cutting oil with extreme-pressure properties suitable for heavy machining, gear cutting, and thread cutting operations. Concentration typically 5–15% sulfur by weight.⁴⁹

Caution: Sulfurised oils are corrosive to copper and copper alloys (bronze, brass). Do not use on copper-bearing surfaces or in systems with copper components.

7.3 Wood tar (Stockholm tar)

Wood tar, produced by the pyrolysis of pine wood (available as a byproduct of charcoal production, Doc #102), has been used for centuries as a lubricant, wood preservative, and water-proofer. It contains phenolic compounds that provide both lubrication and some antioxidant effect.⁵⁰

Application: Blended at 5–20% into tallow grease, wood tar improves adhesion, water resistance, and provides modest anti-oxidation properties. Particularly useful for outdoor chain lubrication, exposed gear teeth, and wire rope treatment.

NZ production: Readily producible from radiata pine using simple retort systems. The technology is the same as charcoal production — tar is collected as a liquid condensate during wood pyrolysis.

7.4 Beeswax

NZ has an active beekeeping industry (Doc #83) and beeswax is a byproduct of honey production. Beeswax is a high-quality natural wax with a melting point of approximately 62–65°C.⁵¹

Application: Blended with tallow, beeswax raises the melting point and improves the consistency of tallow-based lubricants. A tallow-beeswax blend has a higher effective temperature ceiling than tallow alone. Also useful for waterproofing and as a mould release agent.

7.5 Summary of NZ-available additives

Additive	Source	Effect	NZ Availability
Graphite	Recovered from industrial sources; limited natural deposits	Solid lubricant, reduces friction	Limited — conserve and allocate
Sulfur	Geothermal areas (Taupō Volcanic Zone)	Extreme-pressure additive	Available in significant quantity
Wood tar	Pine pyrolysis (byproduct of charcoal production)	Adhesion, water resistance, mild antioxidant	Readily producible
Beeswax	Beekeeping industry	Raises melting point, improves consistency	Available in modest quantity
Lime (Ca(OH)₂)	Limestone (Golden Bay, others)	Grease thickener	Available
Caustic soda (NaOH)	Salt electrolysis	Grease thickener (sodium grease)	Producible (Doc #112)

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8. HYDRAULIC FLUID: THE HARDEST GAP

8.1 Why hydraulic fluid is different

Hydraulic systems are ubiquitous in NZ’s mechanical infrastructure: tractor hydraulics (three-point hitch, loaders, PTO), excavators, log splitters, industrial presses, hydro station gate actuators, truck brakes (air-over-hydraulic), and aircraft landing gear. Hydraulic fluid must simultaneously:⁵²

• Remain liquid over a wide temperature range (typically -20°C to +80°C)
• Transmit force efficiently (low compressibility)
• Lubricate precision internal components (pump pistons, valve spools)
• Resist oxidation at operating temperatures (60–90°C is common)
• Not attack rubber seals (hose connections, piston seals, O-rings)
• Maintain consistent viscosity across the operating temperature range
• Resist foaming
• Separate from water

No NZ-producible bio-lubricant meets all of these requirements simultaneously. This is a genuine gap that cannot be fully closed with NZ materials.

8.2 Why canola oil is inadequate

Canola oil meets some hydraulic fluid requirements — it is liquid at NZ temperatures, has adequate viscosity, and provides lubrication. It fails on:

Oxidation stability: At the 60–90°C operating temperatures common in hydraulic systems, canola oil oxidises rapidly. Within weeks of heavy use, it forms gummy deposits that clog filters, stick valve spools, and score pump surfaces. In a tractor hydraulic system running a loader at full duty, canola oil might degrade to the point of system damage within 50–200 hours of heavy operation.⁵³

Seal compatibility: Canola oil may swell or shrink rubber seals depending on their composition. Nitrile rubber (NBR) seals — the most common in hydraulic systems — tend to swell in the presence of vegetable oils, potentially causing leakage or binding. Viton (FKM) seals are more compatible but less common.⁵⁴

Service life: Even with frequent changes (every 50–100 hours of operation rather than the 2,000+ hours typical for petroleum hydraulic fluid), canola oil’s performance in hydraulic systems is marginal for heavy-duty applications.

8.3 Partial solutions

Canola oil for light-duty hydraulic applications: Low-pressure, low-temperature, low-duty-cycle hydraulic systems — log splitters used intermittently, light-duty tractor hydraulics, small hydraulic presses — can tolerate canola oil if changed frequently (every 25–50 hours of operation) and if operating temperatures are kept below 50–60°C. This is a genuine partial solution for a subset of hydraulic applications.⁵⁵

Extend petroleum stocks: Petroleum hydraulic fluid should be reserved for the highest-duty-cycle, highest-temperature hydraulic applications — the ones bio-lubricants cannot serve. All low-duty-cycle applications should be switched to canola oil immediately, preserving petroleum stocks for critical use.

Castor oil for higher-duty hydraulics: When available, castor oil’s higher viscosity and better oxidation stability make it the best bio-lubricant option for moderate-duty hydraulic applications. Castor oil + canola oil blends (to adjust viscosity) could serve many hydraulic systems at reduced change intervals.

Reduce hydraulic dependence: Where possible, convert hydraulic actuators to mechanical or electrical alternatives. Many tractor hydraulic applications (three-point hitch, some loaders) can potentially be replaced with electric actuators powered by the tractor’s electrical system or a dedicated electric motor, eliminating the hydraulic fluid requirement entirely. This requires engineering development (Doc #91) but is feasible for simpler applications.

Seal replacement: If bio-lubricants cause seal degradation, seals may need replacement with compatible materials. NZ cannot produce fluoroelastomer (Viton) seals, but existing stocks of various seal types should be inventoried and allocated to match lubricant compatibility.

8.4 Hydro station hydraulic systems

Hydro power station gate and valve actuators use hydraulic systems that are among the most critical in the country (Doc #65). These systems typically operate at moderate temperatures and relatively low duty cycles (gates are moved periodically, not continuously). They may tolerate well-filtered canola oil with frequent changes, but this requires careful testing and monitoring. Petroleum hydraulic fluid reserves should prioritise these systems for as long as possible, with bio-lubricant substitution phased in only after controlled testing confirms acceptable performance.

8.5 Honest assessment

Hydraulic fluid is the application where the bio-lubricant performance gap is most consequential. NZ cannot fully replace petroleum hydraulic fluid with domestic materials. The strategy is:

1. Conserve: Reserve petroleum hydraulic fluid for highest-priority applications
2. Substitute where possible: Use canola oil in low-duty-cycle systems
3. Reduce demand: Convert hydraulic systems to mechanical or electrical alternatives where feasible
4. Import via trade: Hydraulic fluid (or its base oils) should be a priority item for early sail trade with Australia (Doc #141), where refining capacity may persist
5. Develop castor production: Castor oil is the best long-term domestic feedstock for hydraulic applications

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9. COMPARISON TABLE: LUBRICANT PERFORMANCE BY APPLICATION

Application	Petroleum Performance	Tallow	Lanolin	Canola Oil	Castor Oil	NZ Grease (Ca)	Notes
Engine oil (ICE)	Excellent	FAIL	FAIL	FAIL	FAIL (marginal)	N/A	No bio-lubricant substitute. Extend petroleum stocks.
Automatic transmission	Excellent	FAIL	FAIL	FAIL	FAIL	N/A	No bio-lubricant substitute.
High-speed bearings (>3,000 RPM)	Excellent	Poor	Poor	Poor	Adequate*	Poor	*Castor oil only viable bio-option. Frequent changes required.
Moderate-speed bearings (500–3,000 RPM)	Excellent	Marginal	Marginal	Adequate	Good	Marginal	Change intervals significantly reduced.
Low-speed bearings (<500 RPM)	Excellent	Good	Good	Good	Excellent	Good	Bio-lubricants adequate for most low-speed applications.
Open gears	Excellent	Good	Good	Adequate	Good	Good + graphite	Tallow + graphite is effective.
Enclosed gear drives	Excellent	Marginal	Marginal	Marginal	Good	Marginal	Oxidation limits tallow/canola. Castor oil best bio-option.
Chain lubrication	Excellent	Good	Good	Good	Good	Good	Bio-lubricants work well.
Hydraulic fluid (heavy duty)	Excellent	FAIL	FAIL	Poor	Adequate*	N/A	*Castor oil with frequent changes. Hard gap.
Hydraulic fluid (light duty)	Excellent	FAIL	FAIL	Adequate*	Good	N/A	*Canola oil with very frequent changes.
Cutting fluid	Good	Excellent	Good	Good	Excellent	N/A	Tallow historically preferred.
Wire drawing	Good	Excellent	Good	Adequate	Good	N/A	Tallow historically used.
Slideway lubricant	Good	Marginal	Good	Adequate	Good	N/A	Lanolin + graphite is effective.
Rust prevention	Good	Marginal	Excellent	Poor	Marginal	N/A	Lanolin is best NZ option.
Marine/wet environment	Good	Adequate	Excellent	Adequate	Good	Good (Ca)	Lanolin superior for water resistance.

Key: FAIL = will cause equipment damage or immediate failure. Poor = works briefly but causes premature wear or degradation. Marginal = works at reduced performance with very frequent maintenance. Adequate = works with reduced service intervals. Good = works acceptably. Excellent = close to petroleum performance.

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10. PRODUCTION INFRASTRUCTURE AND SCALE-UP

10.1 Rendering and tallow processing

NZ’s existing rendering infrastructure (Section 2.1) can produce clean tallow at scale with minimal modification. The critical steps for lubricant-grade tallow:

1. Rendering: Heat treatment of slaughter byproducts to separate fat from protein and water. Existing continuous and batch rendering systems in NZ meat works handle this.
2. Filtering: Remove solid particles. Cloth or metal mesh filtration is adequate for grease production; finer filtration (diatomaceous earth or centrifugal separation) improves quality for liquid applications.
3. Dehydration: Remove water to below 0.1% — water in lubricant promotes corrosion and microbial growth. Heating to 105–110°C under agitation drives off moisture.
4. Quality grading: Test viscosity, free fatty acid content, and moisture. Basic quality control is achievable with simple laboratory equipment.

10.2 Lanolin extraction

Wool scouring produces wool grease as a natural byproduct. The existing NZ scouring process recovers wool grease through centrifugal separation from the scour effluent. For lubricant applications, the crude wool grease (containing approximately 30–50% impurities — dirt, suint, water) must be refined:⁵⁶

1. Centrifugal separation: Existing scouring plant centrifuges separate grease from water and solids.
2. Acid treatment: Treating with dilute acid (citric acid from fermentation, or dilute sulfuric acid, Doc #113) removes residual soap and alkaline contaminants.
3. Bleaching (optional): For cosmetic-grade lanolin. Not required for lubricant use — colour does not affect performance.
4. Drying: Remove water by heating under vacuum or gentle atmospheric heating.

The refining process requires attention to detail for consistent quality — each step (centrifugal separation, acid treatment, drying) has parameters that affect the final product’s suitability as a lubricant. NZ’s existing wool scouring plants have the basic infrastructure; extending it to lubricant-grade lanolin refining is a matter of process control rather than new equipment.

10.3 Canola oil pressing

Canola oil extraction follows standard oilseed processing:

1. Seed cleaning: Remove foreign material and damaged seeds.
2. Conditioning: Heat seeds to ~80°C to facilitate oil release.
3. Pressing: Mechanical screw press extracts oil. NZ has small-scale pressing equipment at existing crushing plants. Additional presses can be fabricated (the screw press is well within NZ machine shop capability, Doc #91).
4. Filtering: Settle and filter pressed oil to remove sediment and seed particles.
5. Degumming (optional): Hot water wash removes phospholipids that contribute to oxidation. Improves oil stability.

Solvent extraction (using hexane to extract residual oil from press cake) is more efficient but requires hexane — a petroleum derivative with finite NZ stocks. Press extraction alone recovers approximately 85–90% of the oil; the remaining oil stays in the press cake, which can be used as animal feed.

10.4 Centralised vs. distributed production

Grease production can be distributed — small-batch calcium grease production requires only a heated vessel, tallow, lime, and a stirring implement. Community-level or regional production is feasible and reduces transport requirements. Quality control guidance should be distributed to ensure consistent product.

Liquid lubricant production (canola oil pressing and refining, lanolin extraction) is better centralised at existing facilities that have the equipment and skills. The handful of existing canola crushing plants and wool scouring facilities can serve national demand.

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11. APPLICATION-SPECIFIC GUIDANCE

11.1 Farm machinery

Tractors — engine: Preserve petroleum engine oil. Extend change intervals cautiously (oil analysis, if capability exists, can guide intervals). When petroleum oil is exhausted, tractor engines become inoperable unless converted to electric or wood gas operation. Bio-lubricants are not viable engine oils.

Tractors — hydraulics: Switch to canola oil for light-duty hydraulic applications (three-point hitch). Monitor closely for seal degradation and filter plugging. Maintain petroleum fluid for loader hydraulics and other heavy-duty circuits. Change canola oil at 25–50% of the petroleum-specified interval.

Tractor — transmission/final drive: Petroleum gear oil lasts a long time in enclosed gear cases if kept clean. Extend use. When replacement is eventually needed, castor oil (if available) or canola oil with frequent changes.

Milking equipment: Milking machine vacuum pumps require lubrication. Tallow or canola oil may be suitable — food safety implications must be assessed (contact between lubricant and milk-contact surfaces). Lanolin may be appropriate given its use in food-contact applications.

General farm bearings: Calcium grease (tallow-lime) for most applications. Lanolin for outdoor and wet-environment applications.

11.2 Machine tools (Doc #91)

Slideways: Canola oil or lanolin + graphite. Applied by hand oiler. Frequent application needed.

Spindle bearings: Reserve petroleum bearing grease as long as possible. Castor oil grease (when available) as substitute. Calcium grease is inadequate for high-speed spindles.

Headstock gears: Castor oil or petroleum oil (conserve). Canola oil marginal at best — oxidation deposits will affect gear accuracy.

Cutting fluid: Tallow, applied directly or as emulsion. This is one application where the bio-lubricant is historically proven and competitive with petroleum. Doc #91 discusses this in detail.

11.3 Hydro stations (Doc #65)

Turbine bearings: These are large, relatively slow-speed hydrodynamic bearings. Canola oil is a plausible substitute, but the consequences of bearing failure at a hydro station are severe (loss of generating capacity). Recommendation: conserve petroleum turbine oil for hydro bearings for as long as possible. Begin controlled testing of canola oil in a low-criticality bearing only after establishing monitoring capability (vibration analysis, temperature monitoring, oil sampling).

Gate and valve hydraulics: As discussed in Section 8.4 — canola oil may work but requires testing and monitoring.

Transformer oil: Hydro station transformers use mineral insulating oil for cooling and electrical insulation. This is a specialised application where bio-lubricants cannot substitute — the oil must be electrically insulating and stable at elevated temperatures for decades. Transformer oil stocks must be preserved and not diverted to other uses.

11.4 Vehicles (essential fleet)

Engine oil: Petroleum only. No substitute. The essential vehicle fleet runs on petroleum engine oil until it runs out or vehicles are converted to electric drive. Extending change intervals (with monitoring) and using highest-quality filters preserves oil stocks.

Wheel bearings: Calcium grease (tallow-lime) is historically proven for low-speed wheel bearings and is adequate for vehicles operating at reduced speeds (Doc #33 recommends 60–80 km/h maximum). At higher speeds, petroleum grease is preferred.

Chassis lubrication: Calcium grease (tallow-lime) — this is the original and traditional application.

11.5 Sailing vessels (Doc #138)

Deck hardware: Lanolin — excellent water resistance, corrosion protection.

Mast fittings and rigging hardware: Lanolin or tallow.

Winch mechanisms: Calcium grease (tallow-lime) or lanolin + graphite.

Propeller shaft (if powered): Castor oil or petroleum oil (conserve).

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12. HISTORICAL PRECEDENTS

The use of biological lubricants is not hypothetical — it was standard practice until the early 20th century. Historical precedent provides both reassurance and caution.

12.1 Pre-petroleum lubrication

Before the petroleum era (roughly pre-1860), all lubrication was biological:⁵⁷

• Tallow: The universal general-purpose lubricant. Used for axle bearings, gears, sliding surfaces, and metalworking. Every blacksmith, mill operator, and machine shop used tallow.
• Lard oil (rendered pig fat): Preferred for lighter-duty applications and for machinery lubrication where tallow’s melting point was too high.
• Whale oil (spermaceti): The premium lubricant — sperm whale oil was prized for clockwork, precision instruments, and light machinery. NZ has no access to this.
• Olive oil: Used in Mediterranean regions for light machinery lubrication.
• Castor oil: Used for high-speed applications, particularly steam engines and later rotary aero engines.
• Neatsfoot oil: From cattle shin bones. Used for leather treatment and fine machinery.
• Tallow + lime grease: Standard bearing grease.

12.2 WWI and WWII bio-lubricant use

Both World Wars saw extensive use of castor oil for high-speed rotary aircraft engines (WWI) and as a strategic lubricant where petroleum was scarce. The UK and US both maintained strategic castor oil reserves during WWII.⁵⁸

12.3 Lessons for NZ

What worked historically: Slow-speed machinery, heavy gears, chain drives, wire ropes, metalworking, and general bearing lubrication were all adequately served by biological lubricants for centuries.

What has changed: Modern machinery runs faster, hotter, and with tighter tolerances than 19th-century equipment. Internal combustion engines, modern hydraulic systems, and high-speed electric motors were designed for petroleum lubricants and push beyond what biological lubricants can reliably serve. NZ cannot revert to pre-petroleum practice because NZ’s mechanical infrastructure was not designed for pre-petroleum lubricants.

The implication: Bio-lubricants work for a subset of NZ’s lubrication needs — a significant subset, but not all of it. The critical applications that bio-lubricants cannot serve (engine oil, heavy-duty hydraulics, high-speed precision bearings) must either continue using petroleum stocks, be redesigned for lower demands, or wait for castor oil or trade-sourced lubricant base oils.

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13. CRITICAL UNCERTAINTIES

Uncertainty	Why It Matters	How to Resolve
Total NZ lubricant stock (all types)	Determines depletion timeline and allocation	National asset census (Doc #8), distributor inventory audit (Doc #1)
Stock composition by type	Some types (hydraulic fluid, high-speed bearing grease) are scarcer than others	Detailed inventory — type matters more than total volume
Canola oil oxidation rate in NZ hydraulic systems	Determines whether canola oil is viable for critical hydraulic applications	Controlled testing program — begin immediately with non-critical systems
Seal compatibility of bio-lubricants with NZ equipment	Seal failure causes system failure	Material compatibility testing against common NZ seal types
Castor cultivation viability under nuclear winter	Determines whether NZ’s highest-value bio-lubricant can be produced	Trial plantings in Northland, Auckland, Bay of Plenty (begin Phase 1)
Lanolin refining quality achievable at NZ scouring plants	Lubricant-grade lanolin may require process development	Pilot refining trials at existing scouring plants
Performance of graphite + tallow/lanolin blends in precision applications	Could improve bio-lubricant viability for machine tools	Experimental program in working machine shops
NZ geothermal sulfur accessibility and quantity	Sulfurised tallow for extreme-pressure cutting oils	Survey of accessible geothermal sulfur deposits
Transformer oil reserve life	Transformer failure threatens grid stability	Inventory and conservation program (Doc #65)

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14. CROSS-REFERENCES

• Doc #1 — National Emergency Stockpile Strategy (lubricant requisition and allocation)
• Doc #53 — Fuel Allocation and Drawdown (reduces lubricant consumption via vehicle mothballing)
• Doc #8 — National Asset and Skills Census (lubricant inventory)
• Doc #33 — Tires (reduced speed limits also reduce lubricant consumption)
• Doc #37 — Soap Production (competing demand for tallow)
• Doc #46 — Lighting (tallow candles as fallback; competing demand for tallow)
• Doc #51 — Ethanol Production (castor oil dissolves in ethanol for two-stroke blends)
• Doc #57 — Biodiesel from Tallow (competing demand for tallow)
• Doc #65 — Hydroelectric Maintenance (turbine bearing lubrication is critical)
• Doc #69 — Transformer Rewinding (transformer oil conservation)
• Doc #74 — Pastoral Farming (livestock numbers determine tallow production)
• Doc #76 — Emergency Crop Expansion (canola allocation)
• Doc #83 — Beekeeping (beeswax as lubricant additive)
• Doc #91 — Machine Shop Operations (cutting fluids, machine lubrication)
• Doc #93 — Foundry Work (mould release lubricants)
• Doc #96 — Bearing Repair and Fabrication (plain bearings reduce lubricant performance demands)
• Doc #101 — Tanning and Leather (tallow and lanolin for leather treatment)
• Doc #102 — Charcoal Production (wood tar as lubricant additive)
• Doc #105 — Wire Drawing (tallow for wire drawing lubrication)
• Doc #112 — Lime and Caustic Soda (grease thickener production)
• Doc #113 — Sulfuric Acid (lanolin refining, geothermal sulfur)
• Doc #138 — Sailing Vessel Design (marine lubrication requirements)
• Doc #141 — Trans-Tasman Trade (lubricant base oil as priority import)
• Doc #160 — Heritage Skills Preservation (traditional knowledge of plant materials and sustainable resource management relevant to lubricant feedstocks)

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FOOTNOTES

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1. NZ lubricant import and consumption data is available through Stats NZ international trade statistics (HS codes 2710.19 for lubricating oils, 2710.20 for petroleum lubricating greases). https://www.stats.govt.nz/ — The 80,000–100,000 tonne figure is an estimate based on NZ market size relative to comparable economies and industry reporting. Exact current figures should be verified against the most recent trade data.↩︎

2. The Marsden Point oil refinery, operated by Refining NZ (now Channel Infrastructure), ceased refining operations in April 2022, converting to an import-only fuel terminal. Even when operational, the refinery’s lubricant base oil production was a small fraction of NZ demand. See: Channel Infrastructure annual reports, https://www.channelnz.com/↩︎

3. NZ registered vehicle numbers from NZ Transport Agency (Waka Kotahi) Motor Vehicle Register statistics. https://www.nzta.govt.nz/ — The fleet includes approximately 3.5–3.8 million light passenger vehicles plus commercial vehicles, motorcycles, and other registered vehicle types. Total fleet size has fluctuated in the range of 4.2–4.5 million in recent years.↩︎

4. NZ livestock numbers from Stats NZ agricultural production statistics and Beef + Lamb NZ. https://www.stats.govt.nz/ and https://beeflambnz.com/ — Numbers cited are approximate as of 2023–2024. See also Doc #74 for detailed pastoral farming baseline data.↩︎

5. NZ tallow and rendered fat production estimates are based on NZ rendering industry data. The NZ Renderers Group (part of the Meat Industry Association) reports on rendered product volumes. https://www.mia.co.nz/ — NZ’s total rendered product output (tallow, meat and bone meal) is significant by global standards. The tallow-specific figure of 100,000–150,000 tonnes per year is an estimate that should be verified against current industry data.↩︎

6. Tītī (sooty shearwater, Puffinus griseus) harvesting and fat use: Beattie, J.H., “Traditions and Legends Collected from the Natives of Murihiku,” Journal of the Polynesian Society, 1920. Also: Moller, H. et al., “Titi (Sooty Shearwater) colony monitoring and mātauranga on Rakiura/Stewart Island,” DOC Science Internal Series, 2002. The fat of tītī is documented as a food preservative and coating material used to protect huahua (preserved meats) stored in sealed containers of bark or kelp. The tītī harvesting tradition — strongly maintained by Ngāi Tahu at Rakiura/Stewart Island — includes detailed knowledge of rendering and fat storage. The relevance to lubricant production is that this knowledge tradition represents practical expertise in animal fat processing that predates European contact by centuries.↩︎

7. Major NZ rendering operations include: Wallace Corporation (Canterbury — NZ’s largest independent renderer), Talleys Group, and rendering departments within Silver Fern Farms, ANZCO Foods, and Alliance Group meat processing plants. Smaller independent renderers operate throughout the country.↩︎

8. Tallow properties are well-documented in oleochemistry literature. See: Shahidi, F. (ed.), “Bailey’s Industrial Oil and Fat Products,” 6th ed., Wiley, 2005. Also: Srivastava, A. and Prasad, R., “Triglycerides-based diesel fuels,” Renewable and Sustainable Energy Reviews, 2000.↩︎

9. Tallow as a metalworking lubricant: Shaw, M.C., “Metal Cutting Principles,” 2nd ed., Oxford University Press, 2005, Chapter 13 (Cutting Fluids). Tallow’s film strength under boundary lubrication conditions exceeds many petroleum-based fluids, which is why it was historically preferred for heavy cutting operations. Also noted in Doc #91, footnote 11.↩︎

10. Oxidation stability of animal fats: Dunn, R.O., “Effect of oxidation under accelerated conditions on fuel properties of methyl soyate (biodiesel),” Journal of the American Oil Chemists’ Society, 2002. The basic oxidation chemistry applies to all unsaturated fatty acid-based materials, including tallow.↩︎

11. Historical use of tallow as a general-purpose lubricant is documented in: Dowson, D., “History of Tribology,” 2nd ed., Professional Engineering Publishing, 1998. Tallow was the universal lubricant of the pre-petroleum industrial revolution.↩︎

12. Journal bearing lubrication with animal fats: standard tribology texts cover the hydrodynamic theory applicable to any Newtonian fluid. The key parameter is viscosity at operating temperature, which tallow provides adequately at low speeds. See: Hamrock, B.J., Schmid, S.R., and Jacobson, B.O., “Fundamentals of Fluid Film Lubrication,” 2nd ed., Marcel Dekker, 2004.↩︎

13. Tallow as a metalworking lubricant: Shaw, M.C., “Metal Cutting Principles,” 2nd ed., Oxford University Press, 2005, Chapter 13 (Cutting Fluids). Tallow’s film strength under boundary lubrication conditions exceeds many petroleum-based fluids, which is why it was historically preferred for heavy cutting operations. Also noted in Doc #91, footnote 11.↩︎

14. Bearing grease temperature limitations: SKF (bearing manufacturer) provides extensive guidance on grease selection by temperature range, speed, and application. https://www.skf.com/ — The temperature ceiling of calcium grease (~60°C continuous) and the speed limitations of bio-lubricant greases are well-established in bearing industry practice.↩︎

15. The unsuitability of vegetable and animal oils as engine lubricants is documented in: Totten, G.E. (ed.), “Fuels and Lubricants Handbook: Technology, Properties, Performance, and Testing,” ASTM International, 2003. Engine operating conditions (high temperature, exposure to combustion products, long drain intervals) are specifically hostile to bio-lubricants.↩︎

16. NZ wool production data from Beef + Lamb NZ Economic Service and NZ Wool Classers Association. https://beeflambnz.com/ — The 120,000–140,000 tonne greasy wool figure is approximate and declining from historical peaks as sheep numbers have fallen.↩︎

17. NZ wool scouring industry: NZ is one of the few countries that scours a significant proportion of its wool production domestically. Major scourers include Cavalier Wool Holdings (Awatoto, Hawke’s Bay) and Woolyarns (Canterbury). Lanolin extraction is a byproduct of the scouring process. See: Edmunds, S., “The New Zealand Wool Industry,” chapter in various NZ agricultural reference works.↩︎

18. Lanolin chemistry and properties: Clark, E.W., “The composition of lanolin,” in “Chemistry and Technology of Oils and Fats,” Gunstone, F.D. (ed.). Also: Kligman, A.M., “The myth of lanolin allergy,” Contact Dermatitis, 1998 — includes composition data.↩︎

19. Lanolin chemistry and properties: Clark, E.W., “The composition of lanolin,” in “Chemistry and Technology of Oils and Fats,” Gunstone, F.D. (ed.). Also: Kligman, A.M., “The myth of lanolin allergy,” Contact Dermatitis, 1998 — includes composition data.↩︎

20. Lanolin’s water resistance is exploited commercially in products like Lanotec (Australian-made lanolin-based lubricant/corrosion inhibitor) and Fluid Film (US-made lanolin-based rust preventive). These products are recognised as premium corrosion protection systems.↩︎

21. Lanotec (https://www.lanotec.com.au/) is an Australian company producing lanolin-based lubricants, corrosion inhibitors, and protective coatings. Their product range demonstrates the commercial viability of lanolin as a lubricant/protectant base.↩︎

22. Seal compatibility of bio-lubricants: Totten, G.E. and De Negri, V.J. (eds.), “Handbook of Hydraulic Fluid Technology,” 2nd ed., CRC Press, 2012. Vegetable oils and animal fats can cause swelling in nitrile rubber (NBR) seals — the degree depends on specific oil composition and seal formulation. Testing is required for each lubricant-seal combination.↩︎

23. NZ canola production data from Foundation for Arable Research (FAR) and Stats NZ agricultural statistics. https://www.far.org.nz/ and https://www.stats.govt.nz/ — Area and yield vary significantly year to year with market conditions. Canterbury is the primary growing region.↩︎

24. Canola cultivation in cool climates: canola (winter and spring varieties) is grown commercially in Scandinavia, northern Europe, and Canada at latitudes and temperatures that may approximate NZ under nuclear winter conditions. Winter varieties are more cold-tolerant but require a vernalisation period. See FAR crop guides for NZ-specific variety recommendations.↩︎

25. NZ canola production data from Foundation for Arable Research (FAR) and Stats NZ agricultural statistics. https://www.far.org.nz/ and https://www.stats.govt.nz/ — Area and yield vary significantly year to year with market conditions. Canterbury is the primary growing region.↩︎

26. Canola oil as a lubricant base: Erhan, S.Z. and Asadauskas, S., “Lubricant basestocks from vegetable oils,” Industrial Crops and Products, 2000. Also: Adhvaryu, A. and Erhan, S.Z., “Epoxidized soybean oil as a potential source of high-temperature lubricants,” Industrial Crops and Products, 2002.↩︎

27. Canola oil as a lubricant base: Erhan, S.Z. and Asadauskas, S., “Lubricant basestocks from vegetable oils,” Industrial Crops and Products, 2000. Also: Adhvaryu, A. and Erhan, S.Z., “Epoxidized soybean oil as a potential source of high-temperature lubricants,” Industrial Crops and Products, 2002.↩︎

28. Oxidative degradation of vegetable oil lubricants: Fox, N.J. and Stachowiak, G.W., “Vegetable oil-based lubricants — A review of oxidation,” Tribology International, 2007. This review covers the oxidation mechanisms and compares vegetable oils to petroleum base oils, documenting the significant stability gap.↩︎

29. Oxidative degradation of vegetable oil lubricants: Fox, N.J. and Stachowiak, G.W., “Vegetable oil-based lubricants — A review of oxidation,” Tribology International, 2007. This review covers the oxidation mechanisms and compares vegetable oils to petroleum base oils, documenting the significant stability gap.↩︎

30. Vegetable oils as two-stroke lubricants: some commercial “biodegradable” two-stroke oils are based on rapeseed/canola oil. Performance is adequate for intermittent, non-demanding applications but inferior to petroleum-based two-stroke oils for high-performance applications. Deposit formation is the main issue.↩︎

31. The unsuitability of vegetable and animal oils as engine lubricants is documented in: Totten, G.E. (ed.), “Fuels and Lubricants Handbook: Technology, Properties, Performance, and Testing,” ASTM International, 2003. Engine operating conditions (high temperature, exposure to combustion products, long drain intervals) are specifically hostile to bio-lubricants.↩︎

32. Castor bean cultivation: Ogunniyi, D.S., “Castor oil: A vital industrial raw material,” Bioresource Technology, 2006. Global production is approximately 1.5–2 million tonnes per year, concentrated in India, China, and Brazil. The plant tolerates a range of conditions but is frost-sensitive and requires warm growing seasons.↩︎

33. NZ climate suitability for castor: Based on general agronomic requirements (frost-free season >140 days, mean temperatures >15°C during growing season). Under normal NZ conditions, Northland and coastal northern NI meet these requirements. Under nuclear winter cooling of 5°C, marginal at best. No NZ-specific field trial data exists — this is an inference from global agronomic literature.↩︎

34. Castor bean cultivation: Ogunniyi, D.S., “Castor oil: A vital industrial raw material,” Bioresource Technology, 2006. Global production is approximately 1.5–2 million tonnes per year, concentrated in India, China, and Brazil. The plant tolerates a range of conditions but is frost-sensitive and requires warm growing seasons.↩︎

35. Castor oil properties: Berman, P. et al., “Kinematic viscosity of castor oil and its methyl esters,” Journal of the American Oil Chemists’ Society, 2011. Castor oil’s unusually high viscosity (approximately 7x canola oil at 40°C) is due to the hydroxyl group on ricinoleic acid, which also confers its exceptional lubricity.↩︎

36. Castor oil properties: Berman, P. et al., “Kinematic viscosity of castor oil and its methyl esters,” Journal of the American Oil Chemists’ Society, 2011. Castor oil’s unusually high viscosity (approximately 7x canola oil at 40°C) is due to the hydroxyl group on ricinoleic acid, which also confers its exceptional lubricity.↩︎

37. Castor oil properties: Berman, P. et al., “Kinematic viscosity of castor oil and its methyl esters,” Journal of the American Oil Chemists’ Society, 2011. Castor oil’s unusually high viscosity (approximately 7x canola oil at 40°C) is due to the hydroxyl group on ricinoleic acid, which also confers its exceptional lubricity.↩︎

38. Castor oil in aviation: castor oil was the standard lubricant for WWI rotary engines (Le Rhône, Gnome, Clerget) because it did not dissolve in the castor-based fuel systems and tolerated the high rotational speeds. The brand name “Castrol” was originally a contraction of “castor oil.” See: Gunston, B., “World Encyclopedia of Aero Engines,” 5th ed., Sutton Publishing, 2006.↩︎

39. Castrol brand history: Wakefield & Co. began marketing castor oil-based motor lubricants under the “Castrol” name in 1909. See: Castrol corporate history, https://www.castrol.com/↩︎

40. Grease technology fundamentals: Lugt, P.M., “Grease Lubrication in Rolling Bearings,” Wiley, 2013. A grease is structurally a thickener (soap or non-soap) holding base oil in a semi-solid matrix by surface tension and physical entanglement.↩︎

41. Calcium grease history: calcium (lime) greases were the dominant industrial grease from the mid-19th century until the development of lithium grease in the 1940s. The Timken Company’s early bearing grease recommendations specified calcium greases made from animal fat and lime. See: Pirro, D.M. and Wessol, A.A., “Lubrication Fundamentals,” 2nd ed., Marcel Dekker, 2001.↩︎

42. NZ lime production: Golden Bay Cement (a division of Fletcher Building) operates limestone quarries and lime kilns at Tākaka, Nelson region. Other lime sources include limestone quarries in Waikato and Otago. NZ has abundant limestone for lime and cement production. https://www.goldenbay.co.nz/↩︎

43. Sodium grease properties: sodium soaps produce greases with higher dropping points (~80–120°C) than calcium soaps but with poor water resistance. See: Pirro and Wessol (note 30), Chapter 8.↩︎

44. Graphite as a solid lubricant: standard tribology texts cover graphite’s layered crystal structure and lubricating mechanism. See: Bhushan, B., “Introduction to Tribology,” 2nd ed., Wiley, 2013. Graphite requires moisture or adsorbed gases to lubricate effectively — in vacuum, it is a poor lubricant. NZ’s ambient humidity provides adequate moisture for graphite lubrication.↩︎

45. NZ graphite deposits: GNS Science mineral occurrence database records minor graphite occurrences in metamorphic rocks in Westland and Otago. These are not commercially developed and their suitability for lubricant use is unassessed. https://www.gns.cri.nz/↩︎

46. Raupō (Typha orientalis) pollen as a dry lubricant: Manley-Harris, M. and Richards, G.N., “Unusual features of the sucrose thermal degradation,” Carbohydrate Research, 1994 — general pollen chemistry. The specific tribological properties of raupō pollen are not extensively documented in English-language literature; this is an inference from the general tribological properties of pollen grains (spherical, hard-shelled, micron-scale particles) and from analogous research on lycopodium pollen (e.g., Bhushan, B. and Kwak, K.J., “Spherical plant pollens as probes for tribological investigations,” Tribology Letters, 2007). The practical significance is modest — raupō pollen is a seasonal and limited resource — but is noted as a direction for experimental investigation by communities with raupō access.↩︎

47. Sulfurised oils as extreme-pressure lubricants: well-established in metalworking. See: Nachtman, E.S. and Kalpakjian, S., “Lubricants and Lubrication in Metalworking Operations,” Marcel Dekker, 1985. Sulfur reacts with iron surfaces under extreme pressure to form iron sulfide, a low-shear-strength solid that prevents metal-to-metal welding.↩︎

48. NZ geothermal sulfur: the Taupō Volcanic Zone contains significant sulfur deposits associated with surface thermal features. White Island (Whakaari) has historically been mined for sulfur (operations ceased mid-20th century). Surface sulfur deposits exist at Rotokawa, Tikitere, and other geothermal fields. See: GNS Science geothermal resource assessments.↩︎

49. Sulfurised oils as extreme-pressure lubricants: well-established in metalworking. See: Nachtman, E.S. and Kalpakjian, S., “Lubricants and Lubrication in Metalworking Operations,” Marcel Dekker, 1985. Sulfur reacts with iron surfaces under extreme pressure to form iron sulfide, a low-shear-strength solid that prevents metal-to-metal welding.↩︎

50. Wood tar (Stockholm tar): produced by slow pyrolysis of pine wood, wood tar has been used for millennia for waterproofing, wood preservation, and lubrication. See: Hjulström, B. and Isaksson, S., “Identification of activity area signatures in a reconstructed Iron Age house,” Journal of Archaeological Science, 2009. NZ’s extensive radiata pine resource makes wood tar readily producible.↩︎

51. Beeswax properties: melting point 62–65°C, density ~0.96 g/cm³. Well-established lubricant, polish, and waterproofing agent. NZ beekeeping industry data from Apiculture NZ, https://www.apinz.org.nz/↩︎

52. Hydraulic fluid requirements: Totten, G.E. and De Negri, V.J. (eds.), “Handbook of Hydraulic Fluid Technology,” 2nd ed., CRC Press, 2012. The multi-property requirements of hydraulic fluid make it one of the most demanding lubricant applications.↩︎

53. Oxidative degradation of vegetable oil lubricants: Fox, N.J. and Stachowiak, G.W., “Vegetable oil-based lubricants — A review of oxidation,” Tribology International, 2007. This review covers the oxidation mechanisms and compares vegetable oils to petroleum base oils, documenting the significant stability gap.↩︎

54. Seal compatibility: elastomer compatibility with bio-lubricants is a documented concern in the bio-hydraulic-fluid literature. See: Frigaard, I.A., “Biodegradable hydraulic fluids — consideration of seal compatibility,” in proceedings of various ASME/STLE tribology conferences. NBR (nitrile) seals are particularly susceptible to vegetable oil-induced swelling.↩︎

55. Canola oil as hydraulic fluid: bio-hydraulic fluids based on rapeseed/canola oil are commercially available in Europe (e.g., Panolin, Fuchs Plantohyd) but these contain synthetic antioxidant and anti-wear additive packages that NZ cannot produce. Unformulated canola oil’s service life in hydraulic systems is dramatically shorter than these commercial products.↩︎

56. NZ wool scouring industry: NZ is one of the few countries that scours a significant proportion of its wool production domestically. Major scourers include Cavalier Wool Holdings (Awatoto, Hawke’s Bay) and Woolyarns (Canterbury). Lanolin extraction is a byproduct of the scouring process. See: Edmunds, S., “The New Zealand Wool Industry,” chapter in various NZ agricultural reference works.↩︎

57. Pre-petroleum lubrication history: Dowson, D., “History of Tribology,” 2nd ed., Professional Engineering Publishing, 1998. This comprehensive history documents the use of animal fats, vegetable oils, and natural waxes for lubrication from antiquity through the industrial revolution.↩︎

58. Castor oil in aviation: castor oil was the standard lubricant for WWI rotary engines (Le Rhône, Gnome, Clerget) because it did not dissolve in the castor-based fuel systems and tolerated the high rotational speeds. The brand name “Castrol” was originally a contraction of “castor oil.” See: Gunston, B., “World Encyclopedia of Aero Engines,” 5th ed., Sutton Publishing, 2006.↩︎