Gumout 510011 Multi-System Tune-Up, 16 fl. oz. Use in gas, ethanol/flex fuel, diesel & biodiesel engines Restores fuel economy and improves engine performance PEA (polyetheramine) effectively removes carbon deposits from the entire fuel & oil systems Stabilizes fuel and oil for up to 2 years Helps pass emissions testing, Lubricates upper cylinders, and Fights ethanol related rust & corrosion