"The only cars that would be warranted for use of the new E15 are flex-fuel vehicles, which are designed to use concentrations of ethanol up to 85 percent (E85)." - http://www.consumerreports.org/cro/news/...akers/index.htm
"Automakers including Chrysler Group LLC, General Motors Co. and Toyota Motor Corp. criticized an EPA plan to allow gasoline containing up to 15 percent ethanol to be used in cars and trucks in the U.S., saying it may void warranties..... 'We have concerns about the potential harmful effects of E15 in engines and fuel systems that were not designed for use of that fuel,' Jody Trapasso, Chrysler's senior vice president of external affairs, wrote." - http://www.autonews.com/apps/pbcs.dll/article?AID=/20110705/OEM05/307059860/1186#ixzz1RKdnBwWs