Developed to combat problems from fuels containing ethanol, this genuine Sta-Bil formula is designed for everyday, optimal performance and protection. Prevents gasoline-related problems during periods of extended storage. Prevents rust, freezing, or gelling of fuel. Keeps jets and float bowls free of gummy residues. Equipment stays "ready-to-use." Helps keep fuel fresh for up to 12 months. Ultra concentrated formula treats up to 80 gallons. 8 fl.oz.