Year round fuel treatment and stabilizer. For gasoline or diesel fuel 2 or 4-cycle engines. Duralt formula marine/RV. Increases power output. Improves fuel economy. Stabilizes fuel up to 8 months. Reduces octane requirements, combustion deposits, hydrocarbon emission, knock and ping, valve seat wear. Reduces diesel smoke, valve seat wear. Reduces diesel smoke and particulates up to 40%. Treats up to 128 gallons. 1 oz. for every 16 gallons of gasoline or 12 gallons of diesel fuel.