Sens. Dianne Feinstein (D-Calif.) and Tom Coburn (R-Okla.), leading a bipartisan consortium including eight other U.S. senators, in December introduced a bill that would eliminate the federal government’s rule that requires the corn-based fuel be included in the country’s gasoline blend. The current law has been opposed by a variety of industries that have claimed the common E15 blend (15 percent ethanol, 85 percent gasoline) is damaging to small engines and would lead to confusion among consumers. The proposed Corn Ethanol Mandate Elimination Act of 2013 would amend the Clean Air Act to eliminate corn ethanol for use in renewable fuels and other purposes. If passed, the act would take effect within 180 days of enactment.