The Lucas Oil Heavy Duty Oil Stabilizer is a pure petroleum multi-use oil supplement 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. Lucas Oil Stabilizer is used in gear oil to stop leaks, reduce operating temperatures, and increase the life of the gear oil. Since it is pure petroleum, it can safely blend with all other automotive lubricants, even synthetics, ATF, and mineral oil.