Plug-in vehicle makers are losing out on sales dollars because the mileage ratings don't make a lot of sense. That's what one Venture Beat writer says after buying a Toyota Prius Plug-in and trying to apply the miles per gallon equivalent (MPGe) standard to real-world results. In short, it's difficult to do.
Miles Per Gallon Equivalent
Toyota has boosted the miles-per-gallon-equivalent (MPGe) ratings for the Prius Plug-in hybrid-electric that it plans to debut in the U.S. next month. The Japanese automaker now estimates that the car will get 95 MPGe in its all-electric mode, up from its prior estimate of 87 MPGe, according to Toyota Division Group Vice President Bob Carter and cited by multiple media outlets.
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
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