I used to pour in two stroke oil at every fillup. Our present truck has a DPF and I don't do that any longer. None of the manufacturers recommend any additives for their diesel engines. Dealers might but the factory dosen't. I think the additives are made for a created need. How many diesel trucks are used by the military? How often do they put out bids for additives?
2011 Eagle 330RLTS with just about every option.
Dodge SRW 1 ton Cummins powered.
I was born with nothing and I still have most of it left.