To be fair, great gas mileage is true for every manufacturer. It's inherent in the technology, and applies across the full range of engine sizes and configurati

To be fair, great gas mileage is true for every manufacturer. It's inherent in the technology, and applies across the full range of engine sizes and configurations. I've driven my BMW 330d 35,000 miles and to my knowledge it's never used even a single millilitre of gasoline.