860,000+ miles on original after treatment. Had it cleaned first time, Peterbilt said it was yellow status and seemed to think it was barely that.
I rarely idle my truck for more than a decent warm up. So, it’s possibly a big cause.
But, my truck does a daily regen if I don’t run Pittsburgh Power, sometimes twice daily. It only regens every three or so days with it. So, I got to stick with it.