The Johnson/Evinrude 2 4 Fuel Conditioner protects the complete fuel system, conditions fuel, and extends the shelf life of fresh fuels. This fuel stabilizer is recommended for day-to-day operation, particularly during long periods of engine non-use. The 2 4 fuel conditioner extends the useful life of fuel in a number of ways. Metal deactivators render brass and copper alloy chemically inactive toward gasoline. Anti-oxidants in this formula slow the chemical breakdown of gasoline. Packed with corrosion inhibitors, 2 4 helps in reducing long-term corrosion of metal components in your engine's fuel system. Key Features: For use on 2 and 4 cycle engines Stabilizes fuel system for one year of storage Dissolves gum and varnish deposits in fuel systems including carburetors and fuel injectors Anti-oxidants slow the chemical breakdown of gasoline Dryers absorb and isolate moisture in the fuel system Corrosion inhibitors to help reduce long-term corrosion of fuel system components Ethanol protection formula