Gold Eagle Start Your Engines is a fuel revitalizer to refresh old fuel and can be used in all 2 and 4 cycle engines. This easy to use formula prevents messy fuel draining by revitalizing old fuel right in the tank. You have to just pour in the recommended amount, (2 ounce treats up to one gallon) and Start Your Engines does the rest. This revitalizer ensures quick easy starts after extended storage, smooth idle and proper engine performance. It is easy to use, comes in a 4 ounce can and is enough for treating two gallons of fuel.