EPA May Raise Ethanol Levels

Feb 04, 2011 View Comments by

The US Environmental Protection Agency (EPA) is close to issuing rules allowing up to 15-percent ethanol in gasoline (E15), up from the current 10 percent (E10). Ethanol increases water formation, which can then create formic acid and damage metals, plastics, and rubber. It can also cause hard starting, surging and other drivability problems, especially in carbureted engines. Consumers may not see E15 at the pump soon, as the EPA must first set regulations on how stations will label their pumps. Stations and distributors may also have to install new storage tanks, hoses, and other equipment. Retailers are not required to offer the E15 fuel and some are concerned that it could cause liability if it damages a vehicle.

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