What he’s saying is his trucks run better and last longer on 10-30 his fleet of 2021s average mileage for those is 500,000 miles. And I understand where you’re coming from as well the 5-40 can do both
2024 6.7 Cummins - Looking for an oil recommended
- Thread starter MikeMcC
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BrendanC
$100 site donor 2024
if you are talking about PD diesel on youtube. he has basically liquidated his fleet of 2022+ trucks. he can’t get them to last regardless of the oil used but IIRC he has had the best luck with 10w-30. he runs Schaffer products and runs extended drains pulling heavy.
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I have a 2021, run either Rotella 5w40 or Cenex Maxtron 5w40 year around. -40 to 110 degrees here in North Dakota
Yep the 22s for some reason are lemons could it be a covid supply chain problem or lack of quality workmanship because of business shutting down during that time? Maybe.
Yeah the workers that didn’t get layed off were pissed because the ones that were layed off made more money sitting at home and didn’t have to pay their rent or mortgage payments.
That state of affairs is the subject for another time.
Does anyone know how to tell when the engine was built by the serial number on it?
I previously went to the Cummins website and put my engine serial number in the system and it gave me assembly date for the engine itself. I think mine was two months earlier than the truck assembly date out of Saltillo.
https://www.cummins.com/support/manuals
"ISB: The dataplate is typically located on the engine rocker cover, but may be located on the side of the gear housing. The engine serial number and CPL provide data for ordering parts and service.
NOTE: ISB engines are produced worldwide. The data plates used on engines may differ in appearance and location of information.
NOTE: If the engine dataplate is not readable, the engine serial number can be identified on the engine block on top of the lubricating oil cooler housing. Additional engine information is available by reading the ECM dataplate."
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Thank you sir.
My master tech has one and has been using Delvac Extreme 10w30 and been very happy with it. It's not too pricey either.
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I'm guessing you never had the infamous lifter issue? Many are saying 15w40 in the gen 5 cummins is the culprit
Many might be using a 15w40 that's not up to the task alot of poor 15w40 oils on the market
Can't speak from experience, but a friend of mine has been running Delvac Extreme 10w30 in his 6.7l. He says the truck just seems to "run better overall" compared to the T6 5w40 he had been running. Not sure what that means exactly, but from what I've seen that Extreme seems to be pretty decent stuff.
My 18’ 6.7 CTD ran extremely well on the 15-40 Delvac Extreme. But Im using VPBE 5-40 in my 22’ and just today went through a drive through sitting in line, up next to the building and not a click or a tick.
Have you documented less frequent regens?
On our own equipment? Yes.
Brand new 2025 Pete’s with PX9s.
I got 8 identical trucks, first 600 ADF oil change was done in September.
When the time to trade my Hemi comes in, I'd get a diesel PU, and I would like to run that oil.
Why not run Delo 600 10w-30 from day 1? It'll be great in your Texas "winters."
I like Liqui Moly Special Tec AA 5w40. That's what I'd use in your application.
I finally figured out how to find the engine build date. It shows the engine was built 5/20/2022. One month before the truck build date. Thanks again.
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