Sta-Bil Diesel Formula Fuel Stabilizer is a diesel additive that keeps fuel fresh for quick, easy starts and maximized for engine performance. Designed for use in all diesel engines and diesel fuels, it helps prevent corrosion, sludge and sediment formation, and cleans and lubricates fuel injectors to improve performance. It is made with a bio-diesel and ultra-low sulfur-diesel fuel-compliant formula. It also helps reduce the oxidation of diesel fuels caused by thermal breakdown and helps remove water that bacteria, fungus, and algae require for growth. Sta-Bil Diesel Formula Fuel Stabilizer is safe to use and recommended for use at every fill-up, with the 32-ounce bottle treating up to 320 gallons of fuel.