Depends on preference, mile expediency, synthetic or not etc. Some run Rotella, I run Amsoil. Easy seach can give you tons of information :thumbsup:.
Edit.Valvoline Premium Blue® Diesel Engine Oil.
That's what Cummins recomends. It's full synthetic.
No but cummins endorses and recommends valvoline premium blue for dodge cummins turbos dieselsCummins doesn't only recommend synthetic nor a single brand. They don't sell Valvoline at my Cummins dealer.
Any major brand quality oil is fine. Just change the oil and sample if you choose. I always do just because it's easy and very good to know when you need it.
I agree synthetics are good but no way necessary in our engines.
COMPLETELY! For the most part oil is oil; a great filter will make more of a difference than brand of oil. :thumbsup:I might add that the brand of oil is not as important as the brand and type of filter being used. If your buying high priced oil but running it thru a fram or any type of filter like that then the money on the oil is pretty useless.