Engine treatment. When added to fuel: Cleans and lubricates the entire fuel system from the tank to injectors, Removes harmful deposits on intake valves and cylinder heads, Lubricates the upper cylinder walls as well as the compression rings and oil rings. When added to engine oil: Improves engine cleanliness reduces gum and varnish, especially in oil burners, Reduces friction and wear, Improves cold temperature fluidity, Helps extend oil life. Size 16 fl. ozs.