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 with all diesel engines, and all diesel fuels, Sta-Bil Fuel Stabilizer – Diesel formula prevents sludge and sediment formation, cleans and lubricates fuel injectors to improve performance and helps remove water. It is safe to use and recommended for use at every fill up, with the 32 Ounce bottle treating up to 320 Gallons of fuel.