So I like the mileage our 2012 D/A gets with and without towing. We are looking at the Ford F350 with 3.55 rear end and wondering if the mileage is comparable or not.
Back to the question, my 2012 GMC D/A combo crew-cab will get around 12 mpg pulling my 30' FW and 19" aluminum boat together. On the highway at around 70 mph, we will get between 18 and 19 mpg. I haven't never owned a Ford Diesel so can't help you with the Ford mpg, but others have.