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230 Miles Per Gallon

Chevy VoltLooks like the Chevrolet Volt is going to be officially rated at 230 MPG!

The Chevrolet Volt, on other hand, runs on electricity that comes from two sources -- a battery as well as a gasoline engine. How much is generated by burning gasoline depends on how far the car is driven.
So let's say the car is driven 50 miles in a day. For the first 40 miles, no gas is used and during the last 10 miles, 0.2 gallons are used. That's the equivalent of 250 miles per gallon. But, if the driver continues on to 80 miles, total fuel economy would drop to about 100 mpg. And if the driver goes 300 miles, the fuel economy would be a just 62.5 mpg.

Even the "worst" MPG rating is impressive.