Lucas Oil Heavy Duty Oil Stabilizer is a 100 percent petroleum product formulated to eliminate dry starts and reduce friction, heat and wear in any type of engine. It allows motor oils a higher degree of lubricity which reduces oil consumption and operating temperatures. This oil stabilizer could be used in gear oil to stop leaks, reduce operating temperatures and increase the life of the gear oil. It can safely blend with all other automotive lubricants, even synthetics, ATF and mineral oil. This stabilizer keeps old engines alive and new engines new.