I've always said "I'm loyal to nothing but logic"...
out of the 30-40 cars I've owned, maybe 5 have been non-ford... am I a "ford guy"? no... I've just always had good luck with them, and once you get to the point where you can put one together from top to bottom in a couple hours with all the spare parts in the garage, it just doesn't make sense to go against the grain you've built for yourself...
but when I started getting diesel fever I stepped back and did my research and talked to people who'd owned both (GM was never an option... I'm not a Ford guy, but I hate GM for the most part... my entire family has had them since I was a kid, and I've never really had a good experience with a GM product. that and the words "GM" and "diesel" don't belong anywhere on the same PAGE)
anyhow, after doing my research and looking at the 18 wheelers and seeing how many miles they rack up, I came to the conclusion that the Cummins I6 was the superior design...
I hear lots of Ford guys make the excuse that even if the Cummins is "slightly" better

that they wouldn't be caught dead in a Dodge. I don't know why... my only experience with Dodge has been the two 3/4 ton CTD's I've owned, but I've been pleased with them thus far.
Would I prefer to have the 5. 9B in a Ford? YES!!!
Would I get anywhere NEAR a V8 diesel? NO!!!!!!
Forrest