Opti-Mizer Fuel Stabilizer with Valve Guard, when added to the fuel of any 4-cycle engine, protects before, during and after operation.  Not only does Opti-Mizer protect the entire fuel system for up to 24 months by preventing resin and gum from forming, its exclusive Valve Guard additive also lubricates valves and cylinder top ends.  For extra fuel system and engine top end protection along with easier engine starting, add Opti-Mizer to fuel cans, storage tanks, and your engine's fuel tank.