The Environmental Protection Agency is allowing higher amounts of ethanol to be used in gasoline, and the decision is drawing mixed reactions.
Right now at most pumps, the gasoline contains 10 percent ethanol. Ethanol producers have asked for permission to offer 15 percent ethanol, and the EPA has said that's O.K. for cars built in 2007 or later. The EPA points to what officials call extensive testing on those vehicles.
Other groups, from AAA to the Petroleum Refiners Association, still argue that not enough testing has been done on other engines like boats or lawnmowers.
Renewable fuel producers argue that that's not proven and point to places like Brazil, where such engines operate routinely on higher ethanol blends. But even they are concerned that by approving "E15"--as it's known only for certain cars--the EPA is confusing consumers and potentially scaring them away from a renewable fuel.