Idling is the "death-blow" to EGR/DPF/DEF equipped diesels and short "grocery/parts-run" trips are a close 2nd. I'm @ 204K on my '11 6.7L Ford, bone-stock. Ford replaced my original EFG valve under extended warrantee @ ~100-110K and I had an DEF heater done @ 180ish K Mi.
If you're doing a lot of idling I think there's a "high-idle" thingamabob that'll allow it to re-gen and keep stuff "cleaner" and help you avoid stockpiling soot in the exhaust system.
FWIW, I've got 4950hrs on my motor to get to 204K Mi. Buddy who manages a fleet of HD pickups for a local business says that most of theirs are closer to 5K hrs/100K Mi because they idle them a lot. They also see more exhaust gremlins than I've experienced as a result.
This nailed it. Diesels are made to run and pull. I had a fleet of diesel one tons and left them all stock....I figured that the manufacturers engineers may know a bit more about the dynamics of these systems than I ever will.
