Chevy Volt to get 230 miles per gallon in city 

(A.P) – General Motors Corp. new Chevrolet Volt rechargeable electric car is expected to get 230 miles per gallon of gasoline in city driving, more than four times the mileage of the current champion, the Toyota Prius, according to GM executives. The Volt is powered by an electric motor and a battery pack with a [...] [...]