Chevy Volt Rated at 93mpg on Electric, 60mpg in Hybrid Mode and 37mpg on Gasoline

The official fuel economy numbers for GM's long-awaited Chevrolet Volt plug-in hybrid are in. Given that the Volt uses two energy sources, electricity from the grid, and gasoline from the pump, with the mix depending on how far you drive and how often you charge the battery, the U.S. Environment Protection Agency (EPA) released three mileage ratings.When driven in pure electric mode, the Volt has