So getting my truck back today, 5th time in the shop in about 2 months. Dealer, in colloboration/communication with Ram, ran a bunch of tests (dont know which ones) and noted that everything came back fine, but that upon a test drive in city traffic, the truck was still loading the DPF in an abnormal way. Based on the comment about oil change above, went ahead and had them change the oil at least to the Mopar brand. Last oil change was at a Goodyear place, which I've used for years but likely will not use for this truck again. This truck seems to tempermental to let anyone but Ram work on it.