Special Report

America's Least Eco-Friendly Vehicles

Source: BMW USA

40. BMW M6 Convertible
> CO2 released per mile: 553 grams
> Fuel efficiency: 16 mpg
> Annual fuel cost: $2,600

39. Nissan Armada 2WD
> CO2 released per mile: 555 grams
> Fuel efficiency: 16 mpg
> Annual fuel cost: $2,300

Source: Courtesy of Ford

38. Ford F150 5.0L 2WD FFV GVWR>7599 LBS
> CO2 released per mile: 555 grams
> Fuel efficiency: 16 mpg
> Annual fuel cost: $2,300

37. Aston Martin Vanquish, S and Zagato
> CO2 released per mile: 555 grams
> Fuel efficiency: 16 mpg
> Annual fuel cost: $2,600

36. Roush Roush Stage 3 Mustang
> CO2 released per mile: 559 grams
> Fuel efficiency: 16 mpg
> Annual fuel cost: $2,600