Official data shows that hybrid vehicles continue to lead the US government's fuel economy ratings, the US Department of Energy (DOE) and Environmental Protection Agency (EPA) said, as they released the 2007 Fuel Economy Guide. This year's Toyota Prius, Honda Civic, Toyota Camry Hybrid and Ford Escape Hybrid FWD models top the list.

Other models leading the list include the Toyota Yaris, Honda Fit (Jazz), Toyota Corolla, Hyundai Accent, Kia Rio, Ford Escape 4WD Hybrid and Mercury Mariner Hybrid 4WD.

Energy secretary Samuel Bodman said: "In addition to looking at the miles-per-gallon rating, I would also encourage Americans to buy flex-fuel vehicles, which are also good for our economy because they use home-grown E-85."

In the US, fuel economy estimates, which appear on the window stickers of all new cars and light trucks prior to sale, are determined by tests that manufacturers and EPA conduct according to EPA specifications. This year's label values are based on the same test methods that have been used in recent years. However, to ensure these estimates continue to remain as reliable as possible, in February EPA proposed changing the methods to better reflect what drivers are experiencing on the road. EPA expects to finalise these changes in time to take effect with 2008 models.

2007 Model Year Overall Fuel Economy Leaders
(city/highway mpg)

1. Toyota Prius (hybrid-electric) 60/51
2. Honda Civic Hybrid 49/51
3. Toyota Camry Hybrid 40/38
4. Ford Escape Hybrid FWD 36/31
5. Toyota Yaris (manual) 34/40
6. Toyota Yaris (automatic) 34/39
7. Honda Fit (manual) 33/38
8. Toyota Corolla (manual) 32/41
9. Hyundai Accent (manual) 32/35
Kia Rio (manual) 32/35
10. Ford Escape Hybrid 4WD 32/29
Mercury Mariner Hybrid 4WD 32/29

Lowest Overall Fuel Economy Models*
2007 Model Year

1. Lamborghini L-147/148 Murcielago (automatic) 9/14
2. Bentley Arnage LWB 10/15
3. Lamborghini L-147/148 Murcielago (manual) 10/16
4. Ferrari 612 Scaglietti (automatic) 10/17
5. Ferrari 599 GTB 11/15
6. Bentley Azure 11/16
Bentley Arnage 11/16
7. Lamborghini Gallardo Spyder 11/17
Lamborghini L-140/715 Gallardo (manual-LR) 11/17
Ferrari 612 Scaglietti (manual) 11/17
8. Aston Martin DB9 Coupe, DB9 Volante (manual) 11/18
Bentley Continental Flying Spur 11/18
Bentley Continental GTC 11/18
9. Jeep Grande Cherokee 4WD 12/15
10. Mercedes-Benz ML63 AMG 12/16
Mercedes-Benz R63 AMG 12/16

*Trucks over 8500 pounds gross vehicle weight rating are currently exempt from federal fuel economy requirements.