Here are the most fuel efficient 2010 models according to fueleconomy.gov:

Model | Transmission Type | MPG (City/Hwy)

smart fortwo coupe

TWO-SEATER CARS

• smart fortwo convertible | automatic | 33/41
• smart fortwo coupe | automatic | 33/41
• Mazda MX-5 | manual | 22/28

MINICOMPACT CARS

• MINI Cooper | automatic | 25/33
• MINI Cooper Convertible | automatic | 25/33
• MINI Cooper | manual | 28/37

SUBCOMPACT CARS

• Toyota Yaris | automatic | 29/35
• Toyota Yaris | manual | 29/36

COMPACT CARS

• Honda Civic Hybrid | automatic | 40/45
• Volkswagen Golf (diesel) | manual | 30/41
• Volkswagen Jetta (diesel) | manual | 30/41

MIDSIZE CARS

• Toyota Prius | automatic | 51/48
• Hyundai Elantra Blue | manual | 26/35

LARGE CARS

• Hyundai Sonata | automatic | 22/32
• Honda Accord | manual | 22/31

SMALL STATION WAGONS

• Audi A3 (diesel) | automatic | 30/42
• Volkswagen Jetta SportWagen (diesel) | automatic | 30/42
• Volkswagen Jetta SportWagen (diesel) | manual | 30/41

MIDSIZE STATION WAGONS

• Volkswagen Passat Wagon | automatic | 22/31

SMALL PICKUP TRUCKS

• Toyota Tacoma 2WD | automatic | 19/25
• Ford Ranger 2WD | manual | 22/27

STANDARD PICKUP TRUCKS

• Chevrolet Silverado 15 Hybrid 2WD | automatic | 21/22
• GMC Sierra 15 Hybrid 2WD | automatic | 21/22

VANS, CARGO

• Chevrolet Express 1500 2WD Cargo | automatic | 15/20
• GMC Savana 1500 2WD (cargo) | automatic | 15/20

MINIVANS

• Mazda 5 | automatic | 21/27
• Mazda 5 | manual | 22/28

SPORT UTILITY VEHICLES

• Ford Escape Hybrid FWD | automatic | 34/31
• Mazda Tribute Hybrid 2WD | automatic | 34/31
• Mercury Mariner Hybrid FWD | automatic | 34/31
• Jeep Compass 2WD | manual | 23/29
• Jeep Patriot 2WD | manual | 23/29