Ford 6.2 gas vs 7.3 gas highway gas milage

I understand people wanting an estimate on mileage. But really, you'd need half a toilet roll to list all the variables that go into that number. I think the phrase "If you have to ask...." really is true in this instance.

I have a '21 f350, 7.3, Lariat, CC,LB,DRW,4:30 ordered and a '21 Northern Lite 10.2 LE, DB coming too. Mileage never entered my mind....