As soon as GM introduced its marketing campaign saying the Volt will get 230 mpg in the city, the Twitter account for the NissanEV shot back with “Nissan Leaf=367 mpg, not tailpipe, and no gas required.  Oh yeah, and it will be affordable, too!”

It is important to keep in mind, however, that both of the mileage claims are still up in the air because it is still to be determined how the EPA is going to measure cars like the Volt, that are extended-range electric cars, or cars like the Leaf, that are strictly electric cars that don’t require fuel.

Nissan claims that its 367-mpg figure was determined using the Department of Energy formula, however it is still going to be quite awhile before we know the actual rating, or information about pricing and new car warranties on both the Volt and Leaf.

Nissan may want to fail to mention in it tweets that since the Volt is an extended-range vehicle, it will have the ability to travel a lot farther because of its supplemental gasoline engine.  The Leaf is just going to be a city car with limited-range.