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!

 

[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!

I had a problem with a daily driver eating lobes at 10,000rpm. This was a 22RE in a Toyota 4Runner. The cam and valve springs where custom made to my specification in the mid 1990's when I was in college. Never did solve that issue. It was always cylinder 3 that would eat a lobe. Eventualy I said the heck with it and just put a SBC and 700R4 in it. I had put a SBF in a Ford Ranger for an uncle and figured why not! For the life of me I do not understand how OEM's have this problem though. Well I do but I hate to see it!

A 10W30 can be very robust or it can be very anemic. You can make a 10W30 with an HTHS above 4 but as I write this the highest I have seen from anyone on the market is 3.5 and I think that is Red Line. Most give you garbage 2.9 which is 5W30 energy conserving 2 territory. That is why guys like Patman consider 10W30 a why bother oil! It always comes down to what a customer will pay for and what they want.

Once you get into an hths of 3.5 and higher you are into what most people would consider a super car oil or a diesel oil. Just because most people are wrong and ignorant does not make a thing right, correct or best pratice. It is then more about how you see the world. If you expect an off the lot Toyota, GM or Ford to be able to drive to the Artic Circle and then to the equator and back again as a matter or routine with factory specified maintenance schedule then you want an oil with an hths of 3.5 or higher and you pant it to pump and flow at insanely low temps and have good evaprotive losses. You would expect all of the fluids to be up to that standard and for the OEM designa nd recomendations to reflect that but that is not what get is it? What we get is a laundry list of compromises mostly for political or ideological reasons that one can not discuss on this site or the science behind it!

Compromises are fine and expected but when they start to stack up it becomes an issue. The way we get around this is that we change out fluids as ambient temps. change but if we just had honest recomendations that would not be as much of an issue. To fit the ideals you need to use fluids that exceed the bellow 75IQ OEM owners manuals recomendations or you must accept more wear than is required. The science was settled long ago but politics which are off limits on this sight often over ride science!

 

[6.7 CTD]

I had a problem with a daily driver eating lobes at 10,000rpm. This was a 22RE in a Toyota 4Runner. The cam and valve springs where custom made to my specification in the mid 1990's when I was in college. Never did solve that issue. It was always cylinder 3 that would eat a lobe. Eventualy I said the heck with it and just put a SBC and 700R4 in it. I had put a SBF in a Ford Ranger for an uncle and figured why not! For the life of me I do not understand how OEM's have this problem though. Well I do but I hate to see it!

A 10W30 can be very robust or it can be very anemic. You can make a 10W30 with an HTHS above 4 but as I write this the highest I have seen from anyone on the market is 3.5 and I think that is Red Line. Most give you garbage 2.9 which is 5W30 energy conserving 2 territory. That is why guys like Patman consider 10W30 a why bother oil! It always comes down to what a customer will pay for and what they want.

Once you get into an hths of 3.5 and higher you are into what most people would consider a super car oil or a diesel oil. Just because most people are wrong and ignorant does not make a thing right, correct or best pratice. It is then more about how you see the world. If you expect an off the lot Toyota, GM or Ford to be able to drive to the Artic Circle and then to the equator and back again as a matter or routine with factory specified maintenance schedule then you want an oil with an hths of 3.5 or higher and you pant it to pump and flow at insanely low temps and have good evaprotive losses. You would expect all of the fluids to be up to that standard and for the OEM designa nd recomendations to reflect that but that is not what get is it? What we get is a laundry list of compromises mostly for political or ideological reasons that one can not discuss on this site or the science behind it!

Compromises are fine and expected but when they start to stack up it becomes an issue. The way we get around this is that we change out fluids as ambient temps. change but if we just had honest recomendations that would not be as much of an issue. To fit the ideals you need to use fluids that exceed the bellow 75IQ OEM owners manuals recomendations or you must accept more wear than is required. The science was settled long ago but politics which are off limits on this sight often over ride science!

Why do you keep ranting in this 2 year old post? You’re responding to yourself. No one even asked a question…

 

[4wd]

Why do you keep ranting in this 2 year old post? You’re responding to yourself. No one even asked a question…

I stopped reading at 10,000 RPM …