Features: -Cleans and removes sludge, dirt, and carbon deposits from carburetors, chokes and& PVC valves. -Contains no chlorinated solvents. -Safe for use on oxygen sensors and electronically controlled carburetors. -Also ideal to clean sluggish chokes and dirty throttle linkages. -Ideal for cleaning lawn and garden equipment, tractors, construction equipment, etc. -The Shield Additive Engine Range conforms to tested OEM and API specifications to provide efficient and safe maintenance, cleaning and protection of engine components. -The Shield Additive Engine Range contains no harmful additives, i.e. alkalis or acids and is not formulated using solid particle lubrication.