Recent content by Palehorse24

Originally Posted By: Bighorn2500 Get an oil with a more stout additive pack like Delo or Mobil Delvac 1300. These engines like Zinc, Moly and Boron in the oil manufactures additive pack to reduce wear on components. I've been running 5W40 Mobil 1 Delvac ESP in my Cummins with some extra ZDDP...

Roadrunner- You are correct. No DEF, but I don't understand the viscosity readings and the relation to the lack of DEF. I'm saying that as an uneducated 1st time diesel owner, not sarcastically.

Thanks for the reply, but you've brought up a couple things that I would like to expand on. First, isn't T6 the synthetic 5W-40? If so, realize that I live in southern Alabama and I would think that the 15W-40 would be more appropriate based on the OEM recommendation and the high temperatures...

All, First ever report on this truck. I bought the truck used with 16000 miles and it is completely stock, except for a drop-in K&N air filter. Did my first oil change with Rotella T 15W-40 and all since with Valvoline Premium Blue 15W-40 and K&N HP 4003 oil filter. I sent the sample due to the...