Pro Gear full synthetic, ester based gear oil offers unsurpassed performance and protection. Technologically advanced formula increases horsepower and delivers superior anti-wear and extreme pressure protection from peak loads and elevated temperatures. It is recommended for use in front and rear differentials, manual transmissions and lower gear units of marine engines or anywhere an API GL-5 heat oil is specified. Compatible with petroleum and synthetic gear oils. The oil does not require the addition of additives. AVAILABLE IN 75W-90 ONLY.