Well, here's how I thought through it : I'm comparing the diesel to the Hemi, not the V6, so it's +$2200 for the diesel option. Hemi is +$2795 over the base model and diesel is +$4995, that's where I'm getting the 2200 extra from. And that's what I'm seeing on my re-order price as well. After that I did similar calc to what you have here. I assumed 13mpg average for the Rebel Hemi and 22mpg average for the diesel, from what I gleaned elsewhere on the Rebel mpg forums here. Where I live gas is $4.49, diesel is $4.99. So that puts the Hemi at ~ 0.34/mile and diesel at ~ 0.23 / mile. Savings of 0.11 / mile, or 20k miles to recoup the cost in fuel alone. That's 2.5 yrs for me at ~ 8k miles / yr. Let's take gas down to $3 / gal ( we can dream, right ! ). Then the Hemi is 0.23/mile ( again at 13mpg ), and if diesel is $3.30, then that's 0.15/mile @ 22mpg. Savings of 0.08 / mile, would require 27,500 miles to recover the 2200.
Diesel owners indicate DEF cost is trivial and doesn't make a huge overall cost impact. Regular maintenance - yeah there's some more cost there I know.
There are other intangibles for me too. I live within striking distance of the Cascadia Subduction Zone. A Mag 9+ earthquake would do some things to the fuel distribution network to put it mildly. I can safely store, for eg, 100 gal of diesel at my house, at least more easily than 100gal of gas. In an emergency, that could be useful. (Although, if the infrastructure is trashed, where exactly do I think i'd be going is a fair question ! ) I used to do that in Ireland. Not for emergency, but to save money. Buy 1000Litres of diesel and put it in a tank. Had an old gas station pump and filled up the car from that. Would fill the 1000L tank up any time prices were low. Was driving a lot of miles back then and went through it quickly enough.
Anyway, I'll see what happens
Apologies everyone for taking the Mark Dodge thread off in a diesel vs gas rabbit hole ! I am sure this has been hashed on many times in the past !