Don't know your situation but here, the difference in fuel costs between gas and diesel negates much of the arithmetic. Adding the diesel option can also negatively affect the payload as well (especially in a 3/4 ton).
Some of us don't want/need a diesel. The OP has mentioned several times that he wasn't interested in one. Let it go man.
correct. At work we have the 6.4 Ram 2500 4x4 and we also have a durmax 2500 4x4. Basically same trucks, but one is gas the other diesel. Ram has about 80,000 mi and the gmc has about 110,000.
Look at it per mile. Ram, about $1.09 a mile for this last year, and the gmc is about $1.94.
Remember we have diesel AND def. The fuel isn't the only cost. Add def. Add repairs which are always more expensive and more involved on the diesels.
Old job we had an 07 gmc 3500 DRW d-max. 2wd, 12' flat bed or maybe it was 11' I don't remember. They gave $12,500 for the truck used in 2012, and they sold the F250/7.3 PSD that they bought new in 2003. The F250 had 124,000 on it, "mostly" trouble free (tires, oil changes, one ICP sensor and a leaking oil cooler which Ford took care of). The D-max had 85,000 on it when they bought it, wasn't used hard.
The Dmax.
Broken transmission crossmember
Broken wire harness (alternator harness)
alternator failure 2x
broken engine harness
6 injectors leaking too much (they put in all 8 because downtime costs $$$)
Another crossmember broken-same one just at a later date.
Transmission failed (allison). They replaced the valve body and it was working again
transmission totally failed, cheaper to replace than to rebuild according to the transmisison shop (I trust them with my own stuff so I believe them).
then the turbo had to be replaced, could've been rebuilt but was same $$$ to replace it.
In 2020 they finally got rid of the pile of garbage. One would say we bought someone else's problem but everything checked out on it and the PO had all service records which checked out perfectly, and was all done at the GMC dealer. He cared for his stuff and it was obvious (he was also a customer). All told, the boss had to put a little over $20,000 worth of repairs into that truck. Injectors were $6500 alone, and transmission wasn't much less as I remember (reman trans). We did a lot of stuff at work that we could do as far as harnesses and crossmembers, brakes, cables, and a blend door but some stuff we just weren't able to do, because of backlogs, paying customers, etc....so we had to hire it out.
But yes the diesels always cost more to keep running and/or repair. My own F250 (7.3 PSD), I just replaced the ICP which was $123 (OEM Ford) and the EBP sensor which was also over $100. Gas engines don't have those sensors. I have a slight oil leak, I think it's the doghouse (CCV) tube but I haven't had time to look at it yet. Maybe tomorrow. A/C is out in the house so if I'm going to be hot, I might as well just go outside and do something productive. My truck also needs injector cups, which I think I can do myself but it's another expense. At 264,000 miles it's probably time to think about injectors too while the thing is apart. There's $2000+ and you don't buy new ones anymore. Some junk remans are cheaper but I don't do cheap stuff. I don't enjoy working on things like I used to.