Pour Sea Foam in your fuel tank to clean & lubricate your entire fuel system. Safe & effective when used in all gasoline or diesel engines – just pour it in! Sea Foam cleans harmful residues & deposits that can restrict oil flow & engine lubrication. Safe for all motor oils, conventional & synthetic. Sea Foam helps stored fuel resist evaporation, preserve ignition vapors & prevent gum & varnish formation. Stabilizes fuel up to 2 years. To stabilize fuel for storage, add 1 ounce per gallon of fuel. After stabilizing fuel, run the engine long enough for the treated fuel to work all the way through fuel injectors or carburetor passageways.