Check the listing for details. Petra Ethanol Fuel Treatment & Stabilizer. Condition: New. Listed at 8.99 USD. Product Description: Petra Ethanol Fuel Treatment & Stabilizer is designed to counter the harmful effects of ethanol fuels including E-1, E-15 and E85. One ounce treats 3.5 gallons or one bottle treats 21 gallons. Ideal for use on every fill up to help prevent the degradation of ethanol fuels. One bottle improves combustion and engine performance. Use in 2 and 4 stroke engines such as lawn mowers, weed eaters, blowers, boat engines and 4 stroke motorcycles. Advantages & Uses: • For use in cars, trucks, lawn mowers, weed eaters, blowers, boat engines and motorcycles • Stabilizes ethanol fuel to keep fuel fresh longer • Cleans injectors & fuel system components Features: • Prevents corrosion • Cleans injectors & fuel system components • Stabilizes ethanol fuel to keep fuel fresh longer • Removes moisture from fuel to help prevent phase separation