A proposed measure in the Senate seeks to overturn the Environmental Protection Agency's approval of E15 sales. The gasoline with 15% ethanol can cause misfueling, damage engines and lead consumers to lose their warranty coverage, said Sen. David Vitter, R-La., one of the senators who introduced the legislation. "I support an all-inclusive energy strategy, but experimenting before understanding the consequences and potential cost of using E15 is unfair to consumers," said Vitter.

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