Least and Most Polluting Cars, 2006

Updated February 21, 2017 | Factmonster Staff Updated by an Factmonster Editor on February 21, 2017

The ACEEE's Green Book®, a buyer's guide to environmentally friendly passenger vehicles, rates cars according to their emissions and fuel consumption, and publishes an annual list of the “greenest” and “meanest” (i.e., most polluting).

Greenest vehicles	MPG: city	MPG: hwy.	Green¹ score
1. Honda Insight	57	56	57
2. Honda Civic GX	30	34	57
3. Toyota Prius	60	51	55
4. Honda Civic Hybrid	49	51	53
5. Toyota Corolla	32	41	46
6. Hyundai Accent	32	35	45
7. Kia Rio/Rio 5	32	35	45
8. Honda Civic	30	40	44
9. Mazda 3	28	35	44
10. Pontiac Vibe/Toyota Matrix	30	36	44
11. Chevrolet Cobalt	25	34	43
12. Saturn Ion	26	35	43

Meanest vehicles	MPG: city	MPG: hwy.	Green¹ score
1. Dodge Ram SRT10	9	12	12
2. Lamborghini Murcielago	9	13	16
3. Bentley Arnage	10	14	17
4. Dodge Durango	12	15	17
5. Dodge Ram 1500	12	15	17
6. Maybach 57S	11	16	17
7. Hummer H2	13	17	18
8. Ferrari F141	10	14	18
9. Ford F-250	13	17	18
10. GMC Yukon XL K2500	13	17	18
11. Volkswagen Touareg	14	18	18
12. Chevrolet Suburban K2500	13	17	19

NOTE: MPG = miles per gallon. 1. The green score runs on a scale from 0 to 100. The top vehicle this year scored a 57, and the worst gas-guzzler scored 12. The score is based on automakers' test results for fuel economy and emissions as reported to the EPA, as well as an estimate of pollution from vehicle manufacturing, from the production and distribution of fuel, and from vehicle tailpipes. It also factors in air pollution. Source: American Council for an Energy-Efficient Economy (ACEEE).

Least and Most Polluting Cars, 2007

Top 20 Selling Passenger Cars in the U.S., 1999–2001

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See also:

Least and Most Polluting Cars, 2008