fuel efficiency
2011 Chevy Volt wins 'Fuel-Sipper Smackdown'
Which fuel-efficient car is most fuel efficient? In the latest “Fuel-Sipper Smackdown” from automotive information site Edmunds.com, the top fuel sipper of the year is the 2011 Chevrolet Volt. The Fuel-Sipper Smackdown 4, which pitted efficient vehicles of all sizes and technologies against each other in three real-world driving