Preventing gumming and varnishing within fuel system, 5-in-1 Advanced Formula Fuel Treatment & Stabilizer features detergent that works to clean engine while it runs. Triple anti-oxidants stabilize fuel, while corrosion inhibitors and metal de-activators protect metal engine components from rust and corrosion. Able to protect and maintain fuel stability for up to 3 years, this alcohol-free product comes in ½ oz pouches and 4, 8, and 16 oz bottles.