Re: diesel trucks
you mean miles total or miles per gallon?
if you are talking miles total I have a 2000 7.3L Power Stroke with over 330,000 miles that is still to this day faster then my 2006 5.9L Cummins with 255,000 miles
Total miles? I have no idea, I maintain them both and drive them both like I stole them, no reason to be easy on them when they do just fine being driven hard, to be honest the one guy I know of that hates his diesel has a 2002 7.3L powerstroke with 86,000 miles(bought it brand new), I keep telling him he is not driving it enough, and if he ever wants to sell it I want to be the first to know!!
If you are talking MPG then I think it varies on how you drive it, but both of my trucks get between 15 and 20 MPG, towing can be lower somewhat.
I know you don't want to get into a peeing contest, I completely understand, Old Ford and Newer Dodge have been very good to me though.