Grun Fluids Gear Oils API GL-5 are premium quality multipurpose gear oils formulated from high performance base oils and a package of additives that provide exceptional thermal stability and resistance against oxidation at high temperatures, wear protection in low speed / high torque operating conditions, excellent protection against corrosion and rust, low temperature lubrication and protection against scratching at highs speeds, minimize shock and the noise resulting from the motion of the meshed gears in the rear axles, thereby providing a smooth and quiet operation during acceleration.