I had a customer take his 2016 5500 in to our local dealer because the check engine light was on. I forget the fault code exactly but it had a description that said something about regen too frequent. The truck gets worked pretty hard locally with decent highway time but does end up idling on a jobsite sometimes. Anyhow local dealer basically told him that he was having issues because it has aftermarket(fleetguard) filters on it. 60,000 miles on the truck and they have been changed at least twice and are currently due again according to truck EVIC. He was basically told that for them to warranty anything in the aftertreatment system he had to run mopar filters and were even trying to convince him he needed to buy their oil because the ash content could be too high in other oils and cause dpf issues. Is mopar oil Valvoline premium blue extreme because that's what comes in the from the factory? Their theory on the fuel filters was that they were letting too much contaminants through and plugging the dpf. If that was the case wouldn't they be telling him the injectors need replaced? So they sold him $200 worth of filters(no oil)and he is coming here for an oil change later today. I had cleared this code once and it came back within a couple days. He was told if he started running their filters he most likely would not have any problems. They also updated the ecm so I wonder if the updates will affect this code at all. They still acted like they would warranty stuff if the mopar filters were used. Has anyone heard any story like this before? My customer wasn't buying it either.