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12 - Chevrolet Volt
Mileage: 35 city, 40 hwy, when driving on gasoline
EV rage: 35 miles

If charged daily, the Volt could function as a purely electric vehicle but ACEEE assumed it would use gasoline about a third of the time. Its relatively hefty weight, taken as an indication of manufacturing and disposal waste, counted heavily against it.

Last updated February 15 2011: 3:50 PM ET
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