According to the www.fueleconomy.gov the official U.S, government source for fuel economy website the following 22 vehicles have the worst fuel economy.  As you and others will notice unless you have deep pockets most of the vehicles listed are out of the average persons price range, with the Camaro being the least expensive. For those who can afford such luxuries and don’t mind spending your fortune on fuel some of these beauties might end up on your wishlist. The list is organized by the worst being the Bugatti Veyron descending from there.

1. Bugatti Veyron, 16 cyl, 8.0 L, Auto (AM-S7)
2. Ferrari FF with Stop-Start option, 12 cyl, 6.3 L, Auto (AM7)
3. Ferrari FF, 12 cyl, 6.3 L, Auto (AM7)
4. Bentley Mulsanne, 8 cyl, 6.8 L, Auto (S8)
5. Cadillac CTS Wagon, 8 cyl, 6.2 L, Auto (S6)
6. Rolls-Royce Phantom EWB, 12 cyl, 6.7 L, Auto (S8)
7. Rolls-Royce Phantom, 12 cyl, 6.7 L, Auto (S8)
8. Rolls-Royce Phantom Drophead Coupe, 12 cyl, 6.7 L, Auto (S8)
9. Rolls-Royce Phantom Coupe, 12 cyl, 6.7 L, Auto (S8)
10. Mercedes-Benz CL65 AMG, 12 cyl, 6.0 L, Auto (5)
11. Mercedes-Benz CL600, 12 cyl, 5.5 L, Auto (5)
12. Chevrolet Camaro, 8 cyl, 6.2 L, Auto (S6)
13. Mercedes-Benz C63 AMG Coupe, 8 cyl, 6.2 L, Auto (7)
14. Maserati GranTurismo Convertible, 8 cyl, 4.7 L, Auto (6)
15. Bentley Continental GT Speed Convertible FFV, 12 cyl, 6.0 L, Auto (S8)
16. Bentley Continental GTC FFV, 12 cyl, 6.0 L, Auto (S8)
17. Aston Martin Rapide S, 12 cyl, 5.9 L, Auto (S6)
18. Ferrari California, 8 cyl, 4.3 L, Auto (AM7)
19. Aston Martin Vanquish, 12 cyl, 5.9 L, Auto (S6)
20. Aston Martin DB9, 12 cyl, 5.9 L, Auto (S6)
21. Mercedes-Benz E63 AMG  4matic (wagon), 8 cyl, 5.5 L, Auto (7)
22. Mercedes-Benz E63 AMG S 4matic (wagon), 8 cyl, 5.5 L, Auto (7)

A List of the Least Fuel Efficient Cars Currently on the Market