ive never had the "active 3" regen shown on the dash, I hit "active 2" a couple times a night on the highway, but driving around town, like on short trips, I hit "active 2" quite a bit. our trucks really love the open highway, and clean themselves out, I removed my dpf filter before and it was just perfectly clean like brand new.
We have 3 modes of regen. Active 1 which is on constantly based of rpm/boost, Active 2, which goes into a partial regen, (over fuel,) when the front and rear pressure sensor alert to 30% restriction. Emergency 3, which when 80* full will initiate full regen, massive overfuel, evic warning not to shut off until complete or risk a no start condition till reset and dpf cleaned. The emergency 3 is the only condition youll see a 4mpg loss on your evic and oil crankcase contamination.
all 5 of my oil samples show 0% fuel in my oil. I have a ratio of 1/3 idle 2/3 driving, 1300hrs so far at 45000.