TruShield Fuel Treatment and Stabilizer protects engine, removes engine deposits, and stabilizes fuel and inhibits engine corrosion. Pump gasoline containing ethanol begins to degrade in as little as 30 days. Untreated gasoline can leave performance inhibiting deposits in engine. Pump gasoline containing ethanol will attract moisture, causing numerous problems including poor performance, rust and corrosion. TruShield boosts the shelf life of pump gas. Formulated for small engines. Treats up to 12 gallons and stabilizes up to 2 years.