Sigma Gear Oil series are heavy duty extreme pressure gear lubricants. They are made from especially selected base stocks that provide good stability at high or low temperature. The ant-wear and anti-friction properties of this series control wear losses. This series resists foaming and are compatible with normally used seal gasket.

Sigma Gear Oil series provide better protection against rust resulting from water contamination and humid atmosphere. This series are intended for initial fill, gapping-up and refill of enclosed of automotive gears for transmissions, gear cases of semiautomatic transmissions where gear lubricants are recommended, drive axels and final drives of passenger cars, trucks, taxicabs, contractor and farm equipment.  They should not be used in automatic transmissions or semiautomatic transmissions for which engine oil or automatic transmission fluid is recommended.

Sigma Gear Oil series are recommended for API service GL-4 covering hypoid and other gears in passenger cars and other automotive equipment operated under high speed shock-load, high speed low-torque, and low-speed high torque conditions.