Sta-Bil Fuel Stabilizer Features Keep your stored gas fresh indefinitely No need to drain your tank for next season Easy-measure, twin-neck bottle provides accurate, convenient measuring and pouring 4 oz. bottle treats 10 gallons 8 oz. bottle treats 20 gallons 10 OZ bottle treats 25 gallons 32 oz. bottle treats 80 gallons 1 Gallon bottle treats 320 gallons