Originally Posted by
frorider
Hopeless Sinner—actually the mpg difference with diesel is significant. IME for same vehicle and payload the diesel gets 30% better mpg in mixed driving. DEF over the last 7 yrs has cost me less than 0.2 cents a mile, ie it’s irrelevant. I’m assuming anyone with a triple digit IQ buys DEF from a pump not a bottle at auto zone.
For my mostly CA/NV/OR driving, diesel was generally cheaper over the last 7 yrs particularly in summer. Sometimes a full dollar cheaper, more typically 50 cents. Ukraine war changed that but the cost last 2 yrs has been similar to RUG.
I recognize that there are regions where diesel is often more expensive that gas, I’m just pointing out that sweeping generalizations need to be taken with a grain of salt.
For a while I kept a spreadsheet on this stuff, back when I was driving more. Pencilled out to approx $10,000 savings cumulatively for me for my rig. The DEF/ DPF / EGR system on my Ford has another 76k miles under warranty, about 8 yrs from now, but if hypothetically I’m throwing 5 grand in repairs at a 17 yr old rig down the road I’m still coming out way ahead.
YMMV.