Dodge offers the Ram SRT-10 in two body styles, a Regular cab and a Quad Cab. The 5,100-lb. Regular cab provides seating for up to three passengers while returning 9 mpg in the city and 15 mpg on the highway. Quad Cab models offer accommodations for up to six people and yield 9 mpg in the city and 12 mpg on the highway. Better to go with the Quad Cab and a full load of passengers – with mileage like that, you’ll need the extra muscle for a push to the next filling station.