Professional mechanics and do-it-yourselfers everywhere rely on this product every day. Sea Foam Motor Treatment dissolves and cleans fuel and oil residues and deposits, stabilizes fuel, controls moisture, and lubricates upper cylinders. Safe and effective when added to gasoline and diesel fuel and oil crankcases - Just pour it in!. Cleans Injectors, Carb Jets, and Passageways Cleans and Lubricates Intake Valves, Pistons, and Cylinders Dissolves Oil Deposits in Crankcases Cleans Timing Chain Tensioners and VVT Actuators, Quiet Noisy Lifters Stabilizes Gas and Diesel Fuels