AAA has warned against potential damage that a new blend of gasoline could do to some engines. The Environmental Protection Agency has certified that all vehicles from 2001 and newer can run on E15. But, says Eric Evarts with Consumer Reports, many automakers "have said that they will not honor warrantees for cars running on E15, even among the cars that the EPA says can run it."
Companies who say their warranties will not cover fuel-related claims caused by E15 — BMW, Chrysler, Nissan, Toyota and Volkswagen. Companies who say E15 may void warranty coverage — GM, Ford, Honda, Hyundai, Kia, Mazda, Mercedes-Benz and Volvo. That's because many automakers are worried that the new mix of fuel can damage the fuel lines in your car over time.