Hi – Tec Gear Oil 80w90 GL-5 is a superior new generation extreme pressure great oil designed for car, truck and tractor manual transmissions, differentials, final drives, transfer cases and steering gearboxes. Its special oxidation resistant paraffinic base oils combine with high performance extreme pressure (EP) additives to ensure long service life to transmission drive lines. It provides excellent thermal stability, much improved oil seal life, increased durability (gear surface life) and corrosion protection under both wet and dry conditions. Meets: API GL-5 and MIL-L-2105D.