Oil Recommendations
 

As the title says, I'd like some opinions of different oils and filters. I'm currently running Rotella because it was in the truck when I bought it. I'd really like to hear your opinions and stories of your experiences. Thanks in advance!

most everyone is going to say use Amsoil. for engine trans
I'm using Valvoline 15w40 for engine and Cummins engine oil filter. only because its free to me
if i had to pay i'd probly use the same.
I used to use Fram filter but not anymore the Crimp leaked on a oil filter i had on my truck once and never used it again. I guess that could happen to any filter maker. But since cummins filter is free i use it

I also use Valvoline synthetic ATF+4 trans oil. Again Free to me so. :tu:

I run Rotella and WIX filters, and have for 170K without any problems. Tranny and Rear are running Mopar fluids, changed at recommended times.

i run cummins approved valvoline. and a guy i know that works for UTA the transit system in Utah. he said thats the only thing they run in the 5.9 and 6.7 cummins busses that drive around all day everyday ..

also if your pocketbook can handle it royal purple is great but for $130 a change i think i'll be fine with the valvoline

We have always used Valvoline blue without any problems. AFE ProGuard filters are what we also recommend:tu:

i am running royal purple in my 08 cummins and afe oil filter

I run the AMSOIL of course. Kinda depends on what you want out of your oil. Are you good with changing it at OEM intervals or are you interested in stretching it out a bit? I currently have 24000 miles on my oil. Just got an OA back yesterday. All is still ok.
Synthetics have their advantages but they come a little price. That price can be negated if used how they can be.

Thanks folks! Heath, I'll be giving you a call in the near future. I have some things I would like to discuss with you.

I now run Valvoline 15w/40 Cummins oil and add two bottles of ZDDP with every oil change. I run WIX oil filters.

I used to use Rotella until they changed their formula reducing the Zinc. The '07 and up engines are fine running the newer oils but the 06 and earlier engines need the old formulas with the higher zinc levels. The newer oils comply with new government standards to help with emissions.

I've long been a fan of Valvoline oils, and was intrigued by their new formula that is specific to Cummins engines. To ensure that I'm getting sufficent zinc to protect camshaft and lifters I add the ZDDP.

If you read closely on the Valvoline bottle it is specifically for the ISM and ISX Cummins, no mention of the ISB engine that is in our trucks.