Engine Oil Additive; 1 Gallon;ADDED TO GASOLINE:Cleans and lubricates fuel injectors and carburetorsImproves gasoline mileageReduces and prevents varnish and gum build-upExtends spark plug lifeSafe for catalytic converters and oxygen sensorsADDED TO ENGINE OIL:Prevents valve sticking and clatterFortifies properties of engine oil, prevents breakdown caused by extreme temperaturesPromotes easier cold weather startsReduces and prevents acid and sludge formationFOR ALL MARINE ENGINES:Inboard and outboard