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Okay, I'm coming up on my first (for me) oil change and leaning towards Mobil 1 synthetic 5w40. Other than seeing the dealership used mopar bulk CJ-4 15w40, I have no way know what the previous owner used. Recommended diesel engine oils seems all over the board but would like your input regarding what I am considering.
We're talking '14 3500 with a little over 38K.
Thanks,
On second thought after seeing so many opinions with regard to fluids, engine oil in particular, I decided best to go to the horses mouth, so to speak. Got all the information needed from Cummins Service Center. Impressed with how helpful they were.