Driven Racing Oil GP-1 Mineral 85W140 Gear Oil - 1 Quart

While GP-1 offers excellent protection, it is formulated for high-performance and competition use. For many daily drivers, a less specialized gear oil might be sufficient. Always consult your vehicle's manual for the recommended specifications.

Mineral-based oils like GP-1 are derived from petroleum and offer good performance. Synthetic oils are chemically engineered for higher stability, better performance across wider temperature ranges, and longer life, but GP-1's mineral base provides naturally high film strength and tack.

It is generally not recommended to mix different types or brands of gear oils, as their additive packages can be incompatible and may reduce performance or cause damage. It's best to drain and refill with a single, consistent product.

For normal use, follow your vehicle manufacturer's recommendation. For competitive or track use, it is advisable to change the gear oil more frequently, often after major events or a set number of hard-use hours, to ensure optimal protection.

Yes, the Driven Racing Oil GP-1 85W140 is formulated with additives specifically to maximize the performance of plate-type limited-slip differentials.

This means the oil inherently sticks to and coats gear surfaces effectively, even under load and heat, without relying heavily on viscosity index improvers (polymers) which can break down. This provides a more consistent and robust protective film.

Verify that the correct viscosity (85W140) and type of gear oil was used. Ensure the fill level is correct. Some minor noise changes can occur initially as the oil works into the gears, but persistent or loud noises may indicate a mechanical issue or incorrect fluid.

Confirm that the GP-1 formulation with LSD additives was used. If chatter persists, a fluid change might be necessary after a break-in period of the new fluid, or inspect the LSD clutch packs for wear.

Check that the fill and drain plugs are tightened correctly. If leaks persist, the differential seals may need replacement, which is independent of the oil type but should be addressed promptly.