MOST FUEL-EFFICIENT: SEDANS $20,000-$25,000

Toyota Prius
Sticker Price: $24,095
Dealer cost: $22,244
New Car Blue Book Value: $24,024
Five-year service cost: NA
One-year insurance cost: NA
Resale value after 3 years: 68% -- 5 years: 52%
City: 48 mpg -- Highway: 45 mpg

The ubiquitous Prius takes top honors for fuel economy with combined city/highway mileage of 46 miles per gallon. It also offers ample legroom and cargo space, as well as plenty of options, including a voice-activated navigation system and MP3 connectivity.

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