Mobilube HD 80W-90 - Heavy Duty Automotive Gear LubricantsMobilube HD 80W-90 is a high performance, heavy duty gear lubricant formulated from high performance base oils and an advanced additive system. This lubricant is engineered for automotive applications including heavy duty axles and final drives where extreme pressures and shock loading are expected.Mobilube HD 80W-90 provides excellent performance where API GL-5 service is required.Mobilube HD 80W-90 - Today’s heavy equipment applications place higher performance demands on drive train lubricants. Higher speeds, higher torque, and heavier loads require improved formulations to maximise equipment life and optimise operating costs. Longer service intervals place additional demands on the gear lubricant requiring effective basestock and additive systems. Mobilube HD Series of gear lubricants are engineered to meet these challenges.