Quote:
Originally Posted by Jonmartin
I'm talking about the Volt it says its range is about 640 miles total. If it had a ten gallon tank with that mileage it should be like 2300 miles range.
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Because the EPA doesn't test cars until the tank is empty. The test loop is roughly 11 miles( 8 miles for the city test and 3.6 miles for highway) and then the EPA does the calculations from there. But, now since the Volt is an extended range electric vehicle, the EPA has developed a new way to test it. As already posted, GM using the draft of what the EPA will use to officially test it, they only probably tested it with the equivalent of 50 miles of driving in city like conditions which then gives you the 230 MPG rating. They take into account the 40 miles already driven under the batteries power and assume the driver will plug it in every night to charge it. If you don't charge it, then your MPG will drop significantly.