85W-140 Gear Oils
Engineered for the most demanding conditions, our 85W-140 gear oils provide ultimate protection for heavy-duty differentials and final drives under extreme loads.
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Eiffel synthetic oils offer superior protection with advanced formulations that provide better engine cleanliness, longer drain intervals, and enhanced performance in extreme temperatures compared to conventional oils.
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A Guide to 85W-140 Gear Oils
When it comes to protecting gears under the most severe conditions, a heavy-duty lubricant is essential. 85W-140 is a high-viscosity gear oil specifically formulated for equipment that operates under extreme loads, high temperatures, and immense pressure. It is the go-to solution for the most demanding heavy-duty applications. Eiffel Lubricants offers robust 85W-140 gear oils designed to provide this ultimate level of protection.
Understanding the 85W-140 Viscosity Grade
The numbers ""85W-140"" describe the oil's thickness and performance at different temperatures, as rated by the Society of Automotive Engineers (SAE).
- 85W: The 'W' signifies 'Winter'. The number 85 indicates that this oil is quite thick at colder temperatures. It is designed for applications in moderate to hot climates where extreme cold-start fluidity is not the primary requirement.
- 140: This is the key to its performance. 140 is a very high viscosity grade at operating temperatures. This means the oil forms an extremely thick, durable, and resilient lubricating film that resists being squeezed out from between gear teeth, even under incredible force.
What is 85W-140 Gear Oil Used For?
85W-140 is a specialised lubricant and is not typically used in standard passenger cars. Its strength lies in its ability to protect the most hard-working gear systems. It is the ideal choice for:
- Heavy-Duty Differentials: It is the standard for differentials in heavy-haul trucks, buses, and agricultural machinery that experience severe shock loads.
- Final Drives: The final drive gears in large construction and mining equipment, like bulldozers and excavators, rely on this oil's extreme pressure protection.
- High-Load Industrial Gearboxes: It is also used in stationary industrial gear systems where speeds may be low but torque and pressure are exceptionally high.
- Older, Worn Differentials: The thick oil film can also help to cushion gear mesh and reduce noise in older differentials that have developed some wear.
The Core Benefits of a High-Viscosity 85W-140 Oil
Choosing a high-quality 85W-140 oil provides unmatched protection for your most valuable equipment.
- Designed for Ultimate Load-Carrying Capacity: Its primary benefit is its ability to withstand extreme and sudden shock loads, providing a constant cushion between gear teeth to prevent catastrophic wear.
- Superior High-Temperature Performance: It is engineered to resist thermal breakdown and maintain its protective thickness even in the most intense operating heat, ensuring consistent lubrication.
- Helps to Reduce Wear and Noise: The thick, cushioning film provides an exceptional barrier against metal-to-metal contact, which significantly reduces wear and can help quieten down noisy gear sets.
Always consult your vehicle's owner's manual for manufacturer-specific recommendations.