This AP story is a little weird. GM says the Chevy Volt will get 230 mpg. Well, yeah, it runs mainly on electricity, not gas. Publishing miles per gasoline-gallon figures for vehicles that don't run on gasoline is a little off. Golf carts get even better mileage. So do roller blades, bicycles and scooters. They get infinity miles to the gallon. There is a free lunch! "Mileage" figures are great, but only as long as they reflect all the energy used.