Super S Fuel Stabilizer 2 & 4-Cycle Treatment utilizes a combination of additives to protect against deposits, rust and corrosion in engines, and protects against gum and varnish formation in fuel systems. It can be used in 2- and 4-cycle engines, such as Motorycles ,automotive, trucks, lawn mowers, chain saws, and generators. Super S Fuel Stabilizer helps keep stored fuel fresh and ready to use when needed.