6. Ferrari FF
If you have enough money to afford the obnoxious purchase price for the FF you likely don’t care that the car only gets an estimated 11 mpg in the city and 16 mpg on the highway. Sure, you get amazing performance and actual cargo space from the car, but keep in mind that you will become a regular at your local gas station. The car’s big V12 engine and all-wheel-drive are the biggest contributing factors to its thirsty ways.