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MSU's award winning EcoCAR towing test equipment - Click above to watch video after the jump

With all of the attention being paid to the 230 mpg number that the Chevy Volt will apparently be granted by the EPA, the Automotive X Prize thought it was time to weigh in on the subject of calculating fuel efficiency for vehicles that use energy sources other than gasoline. They don't like it. Instead, the AXP prefers MPGe, a "rigorous and more neutral measure" of fuel efficiency. The AXP's John Shore walked us through how the long-running competition thinks about MPGe. They've been at it for