Product Overview
Full Synthetic SAE 85W-140 Heavy Duty Gear Lubricant is a clear amber, viscous gear oil (CAS 64742-54-7) built for heavily loaded gear systems: automotive differentials, industrial gearboxes, marine drives, and construction and agricultural equipment. It is the high-viscosity end of the heavy-duty gear-oil range — the pick for gear sets that see the ultimate combination of load, heat, and long drain intervals rather than light-duty or low-temperature service.
We are a chemical distributor, not the blender's marketing arm, so this page sticks to what we can verify: the product's published physical data, its hazard-communication status, the real pack sizes we offer to order, and the documents that ship with it. Buyers range from fleet maintenance shops topping off differentials by the quart to plants and marine operations drawing from 5 gallon pails and 55 gallon drums.
Why This Concentration
SAE 85W-140 is a multigrade viscosity designation, not a chemical concentration. The practical meaning for a buyer: it holds a heavier film at operating temperature than lighter gear grades, which is why it shows up in differentials, final drives, and industrial gear systems running high loads and elevated temperatures. The full synthetic base oil boosts resistance to oxidation and thermal breakdown compared with conventional mineral stock — useful where equipment runs hot or drain intervals are long.
Choose it when your equipment manufacturer specifies SAE 85W-140 or an equivalent heavy multigrade. Do not substitute it into a system specified for a lighter grade; viscosity that is too heavy costs efficiency and can starve tight clearances. Confirm the grade callout in your equipment manual before ordering, and review the technical data sheet — available for this product — against your OEM requirements.
Chemical Profile
This is a clear amber viscous liquid with a mild petroleum odor, supplied as a ready-to-use lubricant. Published density is approximately 0.88–0.90 g/cm³ — lighter than water, and it is insoluble in water, so spills float and separate rather than dissolving. Vapor pressure is negligible, which is consistent with how it behaves in the warehouse: no fuming, no flash-off at ambient temperature, and no vapor odor beyond the mild petroleum note at an open container. The product is identified by CAS 64742-54-7.
Industrial Applications
Where this oil earns its keep is sustained film strength under load. The established uses:
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Automotive differentials and manual gearboxes — heavy-duty gear lubrication where wear protection under shock load matters most.
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Industrial gear systems — enclosed gear drives in manufacturing plants running high loads and temperatures.
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Marine gear applications — gearboxes and stern drives, where the oil's water insolubility works in its favor.
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Construction equipment — final drives and gear cases on machinery working in dirt, heat, and vibration.
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Agricultural equipment — gear cases on machinery that sits seasonally and then runs hard.
In each case the lubricant's job is the same: maintain a load-bearing film between gear teeth, carry heat away from the mesh, and resist the oxidation that thickens and acidifies a lesser oil over a long service interval. Follow your equipment manufacturer's performance recommendations for the specific gear set.
Handling & Storage
This product carries no signal word. Per its GHS classification, it does not meet the hazardous criteria set forth by the 2012 OSHA Hazard Communication Standard (29 CFR 1910.1200). That makes it one of the easier liquids in an industrial storeroom, but our warehouse practice still applies: wear appropriate PPE when handling and dispensing, keep containers tightly closed, and store in a cool, dry place away from direct sunlight. Keep it away from strong oxidizing agents — the one incompatibility worth flagging for a petroleum-based lubricant. HDPE and stainless steel containers are compatible for transfer and secondary storage. Because it is insoluble in water and floats, keep absorbent on hand at dispensing stations; a spilled quart spreads farther than you expect.
Hazmat & Shipping
This gear lubricant is not assigned a UN number, hazard class, packing group, or proper shipping name in our transport data — it ships as a standard, non-regulated liquid rather than as dangerous goods. That classification statement is the full extent of what we can promise: individual carriers set their own service terms, and receivers should follow their own receiving procedures. We pack quarts and gallons cased, 5 gallon pails and 55 gallon drums palletized, the same way our Taylor, TX team handles every liquid shipment.
Documentation
A Safety Data Sheet (English) ships with every order, and a lot-specific Certificate of Analysis is available for the material you receive — not a generic file, the record for your lot. A technical data sheet is also available for spec review before you buy. If your purchasing or EHS process needs any of these ahead of the order, ask and we will send them.
Why Buy from Alliance Chemical
You can buy this lubricant at the scale you actually use it — 1 quart and 1 gallon containers for topping off a differential, 5 gallon pails for shop service, and 55 gallon drums for industrial and marine operations with continuous lubrication demand — each backed by an SDS, TDS, and lot-specific COA. Alliance Chemical has operated since 1998 and has served more than 50,000 customers from our Taylor, Texas warehouse. Shipping and handling guidance on this page is reviewed by Andre Taki, DOT Hazmat Specialist.
