I have the same question, I only have 8K on my 6.7 and I couldn't tell you if it has ever went into Regen, except when I took it in for the last flash, the mechanic said they ran it through?
How can you tell when or if it's in Regen. I'm very curious, because I'm the hardest on my truck, because I have a 4 mile commute, so a ton of start and stop, which I know isn't good.
