Prevent future engine problems with Ethanol Shield. This year-round triple antioxidant formula fuel stabilizer is used for your power equipment with 2-cycle and 4-cycle engines. This preventative maintenance formula eliminates then prevents ethanol-related problems. Proprietary top-tier detergent reduces the need for higher octane as the machine ages. Ethanol Shield removes water, prevents corrosion, provides easy engine starting all year, dramatically slows fuel aging, and keeps stored fuel fresh., Phase separation inhibitor. Vapor Corrosion Inhibitor ( VCI) protects above and below the fuel line for non-ferrous metals. All metal anticorrosive package (top-level ASTM & NACE ratings). Superior antioxidant package. Bonds 2 cycle oil to gasoline/ethanol mix. Combustion Cool Technology ( CCT), upper cylinder lubrication. Use 1 oz. per 10 gallons of fuel. 1 Gallon of Ethanol Shield treats up to 1280 gallons of fuel. Pump is not included