The unworkable nature of the ethanol mandate is a raw deal for consumers, risking higher gas prices, lower fuel economy and warranty-voiding engine damage.
Ethanol is a highly corrosive product that can cause damage in most engines when used in concentrations higher than 10 percent. That’s why gasoline containing 10 percent ethanol (E10) is the only fuel blend approved by the EPA for use in all vehicles, motorcycles, boats and power equipment. Higher ethanol blends can cause a litany of problems for engines not designed to run on the fuel, including unintentional clutch engagement, rubber swelling and metal corrosion. Even worse: many auto warranties will not cover damage from the use of higher ethanol blends, leaving consumers out of luck.
And that's not all–because ethanol contains a third less energy than regular gasoline, gallon-for-gallon, ethanol in your tank means more trips to the pump. In 2011, ethanol's energy shortcomings added about 10 cents per gallon to the cost of U.S. gasoline.