Mobil 1 Synthetic LV ATF HP is an advanced full synthetic automatic transmission fluid formulated from synthetic base oils and an advanced additive system. It is approved and licensed by General Motors against DEXRON HP ATF. The inherently high viscosity index and stability of Mobil 1 Synthetic LV ATF HP helps to protect against thermal breakdown at high operating temperatures, while still providing outstanding performance at extremely low ambient temperatures. High viscosity index and outstanding low-temperature fluidity improve overall transmission durability and cleanliness.