The Lucas Oil Heavy Duty High Performance SAE 80W-90 Gear Oil is a superior lubricant designed to provide superior protection and performance in high performance and heavy duty applications. This oil is formulated with lubricity agents and special anti-wear additives to help control heat and reduce wear. It is designed to provide superior protection and performance in high performance and heavy duty applications. This oil is perfect for use in manual transmissions, differentials and transfer cases. FleetPride is your First Click in Heavy Duty®.