Motorkote Upper Cylinder was formulated to bring additional upper cylinder lubrication and to clean fuel injectors and prevent deposits from forming. Compatible in both fuel and diesel engines and more concentrated fuel cleaning capability then the brand leader. Benefits: Increases horsepower, removes valve stem gum, restores power and engine performance, reduces carbon build up the cause of: Pre-ignition, power loss, burned valves and broken rings, increases fuel efficiency. Cleans injectors to reduce: Power loss, hesitations, pinging/dieseling, loss of fuel economy. Motorkote upper cylinder lubricant is safe for use in all catalytic converters, carburetors, and fuel injection systems and will not void warranties.