But the Volt, of course, is not just any production car. Let's start with the pure-electric (EV) mode. GM long said that the Volt would get 40 miles of gas-free driving on a full charge of its 16 kilowatt-hour battery. They recently replaced the number "40" with a range of 25 to 50 miles, and after spending time in the car I see why. The first leg of my trip was a 45.9-mile drive through the Detroit suburbs—no highway driving, many stoplights, an average speed limit of 45 mph. I made a reasonable effort to drive efficiently, which the Volt turns into a subtle and surprisingly compelling game; when the green bouncing ball that sits just below eye level is sitting still in the middle of a digital column, you're doing well. And you don't have to drive like a hypermiler to do well: Just don't floor it from a stop, and let the regenerative braking (which is all but imperceptible and starts as soon as you lift your foot off the throttle) do as much of the deceleration work as possible. I made the 45-mile drive in pure electric mode with 6 miles left on the battery meter,. The next day, on the first leg of a 155.7-mile route, we did several miles of 80-plus-mph freeway driving, switched it for several miles to "sport" mode and generally tried to push it as much as we could given that we were driving in town, and we got a little over 37 miles of all-electric range.