I need you to help settle something. I have a 99 F250 Extended cab 7.3/Auto/3:73/2WD. Everything on the truck is stock except it has Firestone lift bags. I'm pulling a 94 model 29" 5th wheel, I do not have the gross whight on the trialer.
The question is this: towing in the summer on flat ground with no wind @ 65mph, what kind of milage do you think I will get? I say 10, my buddy keeps insisting that it will be around 13-14. Right now I get almost 19 on running winter fuel on the flats at 65-70 empty.
Thanks in advance for the input.