What kind of engine oil you guys running high mileage '06 Cummins?

[PROSTOCKTOM]

I used to own a trucking company and used Shell Rotella 15w40 in all of our diesel engines. Had a lot of engines last over a million miles without any issues. Probably the best oil for the money available still today.

Tom

 

[Arlo Price]

Been using Walmart 15W-40 for 15+ years. Currently have a 96 & 98 12valve drivers both with 300K+miles that I've put at least 150K on. Wife & I pulled a 26' 2 car wedge with the 98 & had an 03 with 589K miles that we put 90K miles on in 14 mos hauling cars. Walmart SuperTech 15W-40 with Baldwin filters