80W-90 Gear Oils
Discover our robust 80W-90 gear oils, the proven choice for protecting heavy-duty transmissions, differentials, and final drives under high-load conditions.
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A Guide to 80W-90 Gear Oils
80W-90 gear oil is a trusted and highly effective lubricant, known for its robustness in demanding, heavy-duty applications. It's a true workhorse, providing a thick, durable film of protection for gear systems that operate under significant stress. Eiffel Lubricants offers high-quality 80W-90 gear oils designed to provide the reliable protection these hardworking components need.
What Does the 80W-90 Viscosity Mean?
The numbers in ""80W-90"" describe the gear oil's thickness and ability to flow at different temperatures, as rated by the Society of Automotive Engineers (SAE).
- 80W: The 'W' stands for 'Winter'. The number 80 indicates the oil's viscosity at cold temperatures. It is thicker than a 75W oil when cold, making it perfectly suitable for moderate climates where extreme cold is not a primary concern.
- 90: This number represents the oil's viscosity at high operating temperatures. A 90-grade oil provides a very thick, resilient lubricating film that is designed to protect gear teeth under heavy loads and high heat.
What is 80W-90 Gear Oil Used For?
Thanks to its heavy-duty nature, 80W-90 is the standard choice for a wide range of commercial and industrial applications. It is most commonly used in:
- Heavy-Duty Transmissions: It is frequently specified for non-synchronized manual transmissions found in large trucks, buses, and other commercial vehicles.
- Differentials and Final Drives: It is an excellent choice for differentials in trucks, utes, and agricultural machinery, particularly those requiring an API GL-5 rated fluid.
- Agricultural and Construction Equipment: The gearboxes in tractors, bulldozers, and other off-highway equipment rely on the extreme pressure protection of 80W-90 oil.
Choosing Between GL-4 and GL-5
Like other gear oils, 80W-90 is available in different API service categories. It is crucial to use the right one:
- API GL-4: Specifically for manual transmissions, especially those with brass or bronze synchronizers.
- API GL-5: Designed for hypoid gears in differentials, containing a higher level of extreme pressure additives. Using GL-5 in a gearbox that needs GL-4 can cause damage to synchronizer components.
Benefits of a Robust 80W-90 Gear Oil
Using the correct 80W-90 oil is vital for the longevity of your heavy-duty equipment.
- Designed for Extreme Pressure Protection: It is formulated with additives that help to prevent scoring and scuffing of gear teeth, even under the immense pressure of heavy loads.
- Excellent Thermal Stability: A quality 80W-90 oil is engineered to resist breaking down at high temperatures, ensuring consistent protection during long hours of operation.
- Contributes to Component Longevity: By providing a strong, reliable lubricating film, it helps to extend the service life of gears and bearings.
Always consult your vehicle's owner's manual for manufacturer-specific recommendations.