Opti-mizer, 1.4 oz pouch, fuel stabilizer, with valve guard, mixes with 1 to 2.5 gallons of gas, keeps fuel fresh up to 24 months, protects entire fuel system before, during & after operation, use anytime fuel is stored in fuel cans or tanks, off season corrosion protection, exclusive top cylinder & valve lubrication, prevents resin & gum formation, for use in any 4 cycle engine.