2025 denali ultimate oil question

The 2025 should have the crank diameters and connecting rod diameter issues resolved, GM has gone on record saying they are fixed. As a former lead manufacturing enginer for the L87 conversion (From L86) block manufacturing engineer, I can confirm this is true. (I work for GM). The L87 recall issue is very basic as I understand it, and very very unfortunate. (Read: avoidable) from a supplier issue.

In order of Oils for 0w40 Dexos R:
ESP X4 0w40
Supercar
FS

In that order. If prices matters, I would just run FS.



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Is Mobil 1 FS this?
 
I watched the video. It was a good video but he didnt prove anything. He just said that they had a machine that could test down to 1/1,000,000th of an inch. If an engine has wear if 100% or more from diesel oil, because it had one more millionth of wear then how would that ever matter? My uncle gets delo conventional 15-40 by the pallet and runs that oil in every machine he owns, gas and diesel. He has a layover rig company and those machines are used extremely hard and the gas trucks idle sometimes all day.
You want LSPI protection - The Full SAPS M1 is under $30/5Q jug …
 
The 2025 should have the crank diameters and connecting rod diameter issues resolved, GM has gone on record saying they are fixed. As a former lead manufacturing enginer for the L87 conversion (From L86) block manufacturing engineer, I can confirm this is true. (I work for GM). The L87 recall issue is very basic as I understand it, and very very unfortunate. (Read: avoidable) from a supplier issue.

In order of Oils for 0w40 Dexos R:
ESP X4 0w40
Supercar
FS

In that order. If prices matters, I would just run FS.



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I would think any of the Euro 0w40s would work also?
 
Before having kids the wife and i used to do competition bbq. We would buy fixer up motorhomes, use them for a few years and sell them for a profit. Then upgrade to a better one. Better meaning we know what we do/don't want in the next one based off experience. But to answer your question, I just cook it. We really don't like eating out because it's expensive and always a let down. Our bbq team DR SMOKE has 37 grand championships, lots of first place state championship wins including ribeye in the SCA. Two big Bertha wins in Lockhart for first place brisket, two wins at the Houston rodeo with first place chicken calls.

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Badass, comp BBQ is a different game for sure. Ive cooked I think 27 contests.....definetly not backyard BBQ

Got a few top 20s in ribs and shoulder.....nothing great though
 
The test from that machine literally is the proof. Not sure how that was missed. 🤷🏻‍♂️ Wear went up 3x using a diesel oil.
That was measured camshaft wear comparing Driven’s special oil which is probably a chlorinated paraffin to an over the counter Diesel engine oil.
When NASCAR mandated flat tappet cams, they had welded noses and ran the Ford .875” lifter diameter.
The camshafts only had to last the race using very high valve spring pressures at high rpm.
 
Will HPL Super Car 0w40 void the warranty? I would do anything to make sure that expensive behemoth lasts.
 
Dont think so, but Mobil 1 0w40 is cheap, and works well in all sorts of stuff. HPL is for extreme performance guys that honest want to go 15k between changes
I have a 01 tacoma 396k miles, 04 tundra 280k miles, 19 maxima 80k miles, 96 nissan hardbody truck 230k miles and they all get the same oil 5w-40 and all go 10-15k OCI or 1 year whatever comes first. My two uncles even put 40wt oil in their 600+ ci engines with three nitrous kits. I would say 40wt oil has been ingrained since childhood. My dad worked for my uncles layover rig company for almost two decades. All we had on the shelf for oil at the house was 15w-40 delo 😆.
 
Will HPL Super Car 0w40 void the warranty? I would do anything to make sure that expensive behemoth lasts.
Seeing how they *just* changed the spec and obviously there are well known potentially catastrophic issues lurking, I would really stay with the DexosR recommendation and use the M1 FS 0W-40 or whatever the spec says. You know they are going to try to void plenty of warranty cases to save money and will cite "improper maintenance" for more than a few.
 
I have a 01 tacoma 396k miles, 04 tundra 280k miles, 19 maxima 80k miles, 96 nissan hardbody truck 230k miles and they all get the same oil 5w-40 and all go 10-15k OCI or 1 year whatever comes first. My two uncles even put 40wt oil in their 600+ ci engines with three nitrous kits. I would say 40wt oil has been ingrained since childhood. My dad worked for my uncles layover rig company for almost two decades. All we had on the shelf for oil at the house was 15w-40 delo 😆.
My son just bought a new to him 2012 F350 with 224,000 kms on it, and the 6.2L gas engine.
The oil had just been changed at a Ford dealership using 5w20, and a Motorcraft filter.
By the time he drove it 1,300 kms to my place, it was over a litre down on the dipstick.
He then drove to Vancouver for a paramedic re-certification course and back. Another 1,200 kms and the oil was down to the add line again.
I changed his oil to 5w40 Delo and sent him home. So far, three weeks and 2,500 kms later the oil is still on the full mark.
When the Ford 6.2L first came out in 2012 it was a 5w20 engine. But, due to high wear it was changed to 5w30 in 2016. Just shows to go ya, and what I’ve been saying all along, xW20 is no good in truck engines.
 
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I was reading the comments (I do feel I lose brain cells when I read TY video comments....) on the LSJr's video on the GM V8 saga/oil viscosity change and noticed that the recall bulletin *only* mandates the 0W-40 change on engines that pass the test; engines that are replaced still spec 0W-20.

So, OP, you're back to Square 1. This situation seems fluid so they may very well adjust their guidance in future bulletins......I think a lot of that will depend on how many engines fail the test and how many they are stuck replacing. Ultimately, the bean counters will be heard and if company history is any guide, will have the presiding say as costs add up.
 
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Your biggest hint is that in any non-cafe (fuel economy standard) country the manual recomends a higher viscocity oil. Enough said.
 
What exactly were these issues? Got any documents you can share?


What exactly was avoidable?

I don't work in this space anymore, as a lot of engineers have moved onto EVs.

Of course if I had documents I could not (would not) share documents. Talking to an engineer working in the space, avoidable is known measurements / processes at the supplier were not followed.
 
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