Bet this vehicle gets great mileage
 

The Midnight Rider - The World's Largest and Most Luxurious Limosine

This one too:

http://www.associatedcontent.com/art...ands_2300.html

For the amount of cargo a ship with that engine is carrying compared to the efficiency of a normal car carrying a very small amount of cargo it gets incredibly good mpg. :)

Wow that semi thing looks pretty awesome. I wonder how much it is to rent?

the bed probably gets better mileage

Holy Crap..get your whole senior class to chip in and take THAT to the prom.

There used to be this mid 80s Chrysler K-car limo driving around here. Bet that got pretty decent mileage for a limo. But probably pretty low on luxury. It also had a big dent in one of the doors.