truckinfouble
Bronze Member
Just bought a M105. Dealer had a new guy doing the clean and prep and he put about a quart of Diesel in the DEF. I didnt notice till I was home and 6 hours into using it. Thankfully it didnt do a regen so the contamination stayed in the tank but cleaning that was not on my list of things I wanted to do today.....by the way, dealer provided new filter and DEF fluid for me. They would have cleaned it too but I didnt have time to take it to them and with my experience as a tank mechanic as well as Caterpillar mechanic they trusted me enough to do it under warranty and not void it.