That's why my diesel is pre-emissions 2001, with a manual trans. Extended cab, 8' bed, 4x4 Ram 2500. When I bought my Charger in FL, I towed it home with the Ram....and it gave me 18mpg towing the car from FL to MD. It gets me 20-22 daily driving up and down a mountain to get to and from home. It's my gig truck, it's always loaded with audio gear or pulling a trailer full of audio gear. Or hauling stuff for yardwork, or home projects, or parts, or motorcycles....it rarely makes a round trip, empty.
And, it's got 288k miles on it at the moment.
Now, my '14 Grand Cherokee has DEF and being a light-duty vehicle that I don't tow with (why would I - I have a cummins!)...I've had zero problems with it. Fill the DEF once a year (about $17 at the pump)....and that's it. 25mpg city, 32 highway.
Diesel may be more expensive per gallon, but if you do the math it's still cheaper per mile. I spend about $0.05 a mile more on fuel driving my Wrangler TJ to work, than I do driving the diesel Grand Cherokee...and about $0.02 a mile more in the Wrangler, than I would if I drove my cummins every day. And, no tuneups on the diesels - no plugs, no wires, no coils...just a fuel filter every 10k miles, and the diesels are happy campers.
A couple pennies a mile might not sound like much, but if you go 300 miles a tank? That's $15 a tank. If I do 10k a year in my Wrangler, just the fuel costs put me $500 behind the Grand Cherokee, based on the per-mile cost. And that's figuring our current local pricing of 3.99 diesel and 3.00 unleaded.
It adds up.
And that $500 I save? Fills the Charger quite a few times over the season, so I can drive and love it !!