Formulated with synthetic base stocks and premium performance additives, U1P-Drive Full Synthetic ATF Universal Optimum Elite Synthetic HD is a premium high-viscosity, heavy-duty synthetic transmission lubricant. This product contains a premium performance additive package designed for excellent oxidation stability and thermal resistance as well as excellent friction modification properties. U1P-Drive Full Synthetic ATF Universal Optimum Elite Synthetic HD is a universal automatic transmission lubricant which is suitable for use in nearly all makes and models of automatic transmissions including passenger cars, light trucks, heavy-duty trucks, commercial vehicles, as well as off-road vehicles.