Supreme Gear Lube SAE 75W-90 is a parasynthetic, shear stable, thermally stable, thermally durable, multigrade gear lubricant recommended for use in all types of automotive gear drive applications that require a gear oil to operate under severe, wide ambient temperature ranges. Supreme Gear Lube SAE 75W-90 is blended from the finest quality, severely hydrotreated, polyalphaolefin (PAO) synthetic base fluids and severely solvent refined, severely hydrofinished, high viscosity index, 100% pure paraffin base oils available.