2024 6.7 Cummins factory fill UOA

[johnmyster]

Because they assume that as a whole the 15w40 oils will be of inferior quality to those that are 5W-40 at least in terms of base stocks. It’s an easy way for them to communicate this to their customers.

I don't disagree but strangely 10w30 is allowed which is available as a conventional. Rotella T4 and Delvac 1300, both meet CES 20086. Our 6.7 is solid lifter, so no dog in the fight.

It seems like a better way would be to make it a part of Cummins CES 2008x, rather than all the confusion/stigma about cold flow in the bro diesel truck communities.

Our Mazda, likewise, was spec'd 0w-20 due to the OEM's desire for full synthetic, so the concept is not new.

 

[kschachn]

I don't disagree but strangely 10w30 is allowed which is available as a conventional. Rotella T4 and Delvac 1300, both meet CES 20086. Our 6.7 is solid lifter, so no dog in the fight.

It seems like a better way would be to make it a part of Cummins CES 2008x, rather than all the confusion/stigma about cold flow in the bro diesel truck communities.

Our Mazda, likewise, was spec'd 0w-20 due to the OEM's desire for full synthetic, so the concept is not new.

Yes, always confusion about what the winter rating means, and equally important what it does not mean.

Sometimes these bulletins or communications from automakers are dumbed down so much they generate confusion instead of clarification.

 

[JackWildfeuer]

That oil is looking anemic for a diesel oil expected to last 15,000 miles per OEM recomendation!

 

[JackWildfeuer]

Well the new engines with prohibation against 15W40 are not doing so well. They are having massive issues with lifters and cam lobes. The CAM design, materials, and manufacture is as good as it gets but the lifters and push rod design are terrible! You can not fix a bad design with great oil.

DAVE's has a kit that I think they designed that fixes this problem! They redesigned the lifters, push rods and rock arms! If the cam is good I think it can be reused but normaly the way this goes by the time the average person hear a problem a lobe is already gon on the cam!

OEM's are made up of humans and humans have bias and the most biased and stuborn group of people I know is/are engineers! Some of the dumbest smart people I know. The only thing that saves me is that I was an ASE Automotive Master Tech before I was an Engineer plus I have Business and Medical degree's and am a Pilot so I am not normal! Like that cat that is a Navy Seal, Astronaught and MD! I too am a stuborn, stupid, smart person!