Chevy Volt mpg figures released

The 2011 Chevrolet Volt, an innovative plug-in hybrid, received not one but three different mileage ratings from the U.S. EPA today. On electricity alone, the Volt achieves the equivalent of 93 mpg. Powered solely by the gasoline engine, the Volt gets 37 mpg. Running on a combination of electricity and gasoline, the Volt generates the equivalent of 60 mpg, the …