Cranky1
Banned Old Stinky Fart
I understand that the older Cummins have non roller cams and need oil with ZDDP in it too?
All I can find anymore in the Rotella is the CJ-4 and that's the 'new' junk.....Yes Shell rotella is the only oil I know of that has the additives for flat tappet cams
I prefer Amsoil Diesel myself,along with their trans,diff fluids
That will workhttps://rislone.com/wp-content/uploads/2014/11/4405-Tech-Sheet-1.pdf
I'm thinking of this with cj rotella. Opinions?