Penray 82612 Ethanol Stabilizer - 12-Ounce Bottle Each 12-Ounce Bottle Treats Up To 20-Gallons Designed to Treat and Stabilize Fuel for Up to One Year Helps Prevent Ethanol Separation, Corrosion and Sludge During Storage Keeps Fuel Injectors Clean and Prevents Fuel System Carbon Deposits Ideal for Automobiles, Watercraft, Tools and Machinery