Quote:
Originally Posted by NeilBlanchard
They test it like any other car, and convert the Wh consumption to MPGe with a factor of 33.7kWh / gallon of gasoline (E10 presumably). So, it is measured performance.
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Wh consumption as determined by what? The optimistic (or pessimistic in the case of the MB) meter in the car?
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That is my point. That makes just as much sense as the guys we talk to that compute their fuel economy by looking at the half full gas gauge as saying they used half of 14 gallons because that is what the book says the tank holds and the gauge says half.
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The only way to know the energy consumption of an electric is to fill and then top off after driving the same as with a gas car. But they probably do just read off of the onboard gauge which means that the auto makers can fudge the numbers any way they want.