When I drove my 91 dakota accross country back in 08 it ran a pretty steady 250 most of the 2000 mile drive with waaaaaaay too much weight in the bed (my tool box and a bunch of engine/trans parts) and a treighler that weighed about 5000 lbs hooked to the bumper right next to the stamp that says do not exceed #300 trailer weight (or something to that effect).