Keeping you Ready for the Road Ahead™, the Lucas Oil Products Heavy Duty Oil Stabilizer is a pure petroleum, multi-use oil treatment supplement that provides stability of noise, heat, and wear in manual transmissions and differentials. Experience increased oil life by at least 50%, while also enhancing power and miles per gallon. Safe to blend with all automotive lubricants, eliminate dry starts and reduce heat, friction, and engine wear with this heavy duty oil stabilizer. FleetPride is your First Click in Heavy Duty®.