General Motors said today that their Chevrolet Volt electric vehicle (extended range) will get approximately 230 miles per gallon in city driving. This number has not been confirmed by the Environmental Protection Agency, who is currently working on a new system for calculating fuel ratings for cars that can travel long distances powered only by electricity. It ultimately will have a lot to do with the battery charge.

The Volt will be able to get up to 40 miles on a battery charge, and then the gas engine will kick in and recharge the battery. The battery can also be charged by plugging it in for an eight hour period. They are scheduled to be released it in 2011.