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Mazda ranks as the most fuel-efficient automaker in EPA report

Detroit's Big Three Remain Biggest Gas Hogs, According To Federal Data

Mazda builds the most fuel-efficient cars, says a new federal report. Detroit's Big Three? When it comes to fuel savings, they have work to do.

Feds release 2010 Fuel Economy Guide, Prius still most miserly

2010 Toyota Prius - Click above for high-res image gallery

Feds release 2010 Fuel Economy Guide, Prius still most miserly

2010 Toyota Prius - Click above for high-res image gallery

Toyota wants you to know it has the most fuel efficient line

Click above for 91 high-resolution images of the new Scion xD