Seafoam Motor Treatment 16ozSea Foam is petroleum based additives that works in fuel and oil system. Cleans injectors, carb jets and passageways. Cleans and lubricates intake valves, pistons and cylinders. Dissolves and cleans fuel residue in fuel systems. Dissolves oil deposits in crankcase. Clean timing chain tensioners and VVT actuators, quiet noisy lifters. 100 percent pure petroleumFeatures cleans critical engine areas; stabilize & protect fuels from degrading; safe in all engines;