Features: Improve performance by helping fuel to be burned better and cleaner. Use with all gasoline, flex fuel and E10 E15 E85 ethanol. Regular use, summer and winter, maintains optimum efficiency and power. Works with all fuel injected, turbo, direct injected & carbureted engines. Rislone, protecting engines since 1921. EZ Nozzle works in all vehicles including capless fuel tanks, guaranteed. Satisfaction Guaranteed If not satisfied, purchase price will be refunded by mail. See bottle for more information.