Effective in all gasoline & ethanol blended fuels, including e-10 through e-85. Keep fuel fresh for up to 24 months. For quick, easy starts after storage. Treat up to 10 gallons. Product can be used for up to 2 years after bottle has been opened. Prevents gum, varnish & corrosion. Safe for use in all gasoline engines, including 2-cycle. Eliminates need to drain fuel. Effective in all gasoline & ethanol blended fuels including e-10 through e-85. Keeps fuel fresh for up to 24 months. Product does not contain alcohol. Satisfaction Guaranteed: If not satisfied, mail sales receipt to us & your purchase price will be refunded. www.sta-bil.com. Made in USA.