BREAKING: GM is officially recalling the L87

[Scarey]

Under ideal conditions the thin oil can work (and give a slight fuel milage advantage).

Under anything other than idea conditions, the 0W40 oil is better in every way.

Here's an easy to understand analogy. Say you're varmint hunting and using a 22LR chambered rifle and that gets the job done (like the 0W20 oil gets the job done under ideal conditions) . What is the downside to using 223 Remington chambered rifle to hunt the same varmints with? The 223 Remington rifle will absolutely be as effective on the same varmints as the 22LR under ideal conditions, but also be able to get the job done in places and at distances the 22LR just can't,,, with the only disadvantage being slightly more felt recoil.

So if the owner is willing to accept the slight reduction is fuel milage, then there is absolutly no disadvantage , but plenty of advantages, to running a 0W40 oil compared to an 0W20 oil.
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There will be nothing left to eat if you use a 223.

 

[Silverado4x4]

Again , not true. You seriously don't know what you're talking about in every post of yours I've ever seen

The oil pumps are positive displacement, meaning they pump a given volume per revolution regardless. Thick oil or thin oil, they pump the same volume per revolution.

And, again, just as another example of you showing that you don't know what your talking about, the only time the 40 weight oil would be twice as thick is when the engine is a full operating temperature.
So when cold the 0W20 oil is thicker than the 0W40 oil is at full operating temperature. So if 0W40 oil was an issue at full operating temperature, then the 0W20 oil would also be when cold.

Literally any condition , any climate, or any circumstance where an 0W20 oil would work , an 0W40 oil would also work at least equally as good, and in most cases better, with the only drawback being slight less fuel milage.
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Not true I have been around liquid pumps for about 40yrs and this is just example, a pump that is designed to pump let's say water that pump running at a set rpm pumps 2 gallons of water a minute now that same pump running at the same rpm with a twice thicker liquid will only pump 1.5gal and the only way to get the same capacity is to increase motor rpm but that's limited to the max capacity of the pump so Valdimir does know what he's talking about. Pumps will only pump a liquid of what's its designed for at max rpm so if you run that pump over max capacity your not going to anymore volume.

 

[Antonm]

There will be nothing left to eat if you use a 223.

Varmints,,, you don't eat varmints ,,,that's why they're called varmints not game.
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[Vladimir2306]

Again , not true. You seriously don't know what you're talking about in every post of yours I've ever seen

The oil pumps are positive displacement, meaning they pump a given volume per revolution regardless. Thick oil or thin oil, they pump the same volume per revolution.

And, again, just as another example of you showing that you don't know what your talking about, the only time the 40 weight oil would be twice as thick is when the engine is a full operating temperature.
So when cold the 0W20 oil is thicker than the 0W40 oil is at full operating temperature. So if 0W40 oil was an issue at full operating temperature, then the 0W20 oil would also be when cold.

Literally any condition , any climate, or any circumstance where an 0W20 oil would work , an 0W40 oil would also work at least equally as good, and in most cases better, with the only drawback being slight less fuel milage.
...

You're talking some nonsense again, a massive pump on gm, in the fifth generation it is not volumetric, it creates the pressure on which it works. Our mechanics set up an experiment by putting a pump from the Corvette on the Escalade, but it is different. For now, this escalade is being watched. But unfortunately, no one has yet been able to break the Global B and change the pressure and algorithm of the oil pump. As for the temperature, well, yes, 40 is twice as thick as 20k on a warm engine, which warms up in 15 minutes even in very severe frost, or in a couple of minutes in warm weather. Therefore, the engine works most of all on the index of heated oil
What do you think will happen to you if your blood becomes twice as thick?)) Will it make you feel good?)

 

[Antonm]

Not true I have been around liquid pumps for about 40yrs and this is just example, a pump that is designed to pump let's say water that pump running at a set rpm pumps 2 gallons of water a minute now that same pump running at the same rpm with a twice thicker liquid will only pump 1.5gal and the only way to get the same capacity is to increase motor rpm so valdamer does know what he's talking about.

Only true for rotodynamic (commonly called centrifugal) style pumps, not true for positive displacement style pumps (which the oil pumps in most automotive engines are positive displacement).

I am a hydraulic engineer for an industrial pump OEM. I'm literally typing this from my work computer with pump hydraulic modeling software (AFT fathom to be exact) open on my other screen, and I'm also a Hydraulics Institute certified Pumping System Assessment Professional among other things.

Also, just to be specific, what you said above isn't even true all the time for rotodynamic pumps. Even in those non-positive displacement pumps flowrate is determined by the intersection of the pump curve and the system curve, changing either will change flowrate. It would appear that even though you've "been around liquid pumps for 40 yrs" you do not have a grip on basic pump fundamentals. Nothing wrong with that if that wasn't your job, my wife has been "been around" cars and driving them for 40 years, she doesn't have a clue what a piston is.
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[Antonm]

You're talking some nonsense again, a massive pump on gm, in the fifth generation it is not volumetric, it creates the pressure on which it works. Our mechanics set up an experiment by putting a pump from the Corvette on the Escalade, but it is different. For now, this escalade is being watched. But unfortunately, no one has yet been able to break the Global B and change the pressure and algorithm of the oil pump. As for the temperature, well, yes, 40 is twice as thick as 20k on a warm engine, which warms up in 15 minutes even in very severe frost, or in a couple of minutes in warm weather. Therefore, the engine works most of all on the index of heated oil
What do you think will happen to you if your blood becomes twice as thick?)) Will it make you feel good?)

LOL, you do you. I can only explain it to you, I can't understand it for you too.

Have fun with your 0W20
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[Vladimir2306]

LOL, you do you. I can only explain it to you, I can't understand it for you too.

Have fun with your 0W20
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Imagine, I'm happy to drive on the 0-20, on the 4th generation Tahoe, and now on the 5th generation on the Yukon)) because I understand perfectly well that the transition to 0-40 oil is just a band-aid to plaster the big GM mistake, and yes, 5.3 drive without problems on 0-20 oil, and diesel engines run on 0-20 oil, wow

 

[OR VietVet]

 

[Blackcar]

Again , not true. You seriously don't know what you're talking about in every post of yours I've ever seen

The oil pumps are positive displacement, meaning they pump a given volume per revolution regardless. Thick oil or thin oil, they pump the same volume per revolution.

And, again, just as another example of you showing that you don't know what your talking about, the only time the 40 weight oil would be twice as thick is when the engine is a full operating temperature.
So when cold the 0W20 oil is thicker than the 0W40 oil is at full operating temperature. So if 0W40 oil was an issue at full operating temperature, then the 0W20 oil would also be when cold.

Literally any condition , any climate, or any circumstance where an 0W20 oil would work , an 0W40 oil would also work at least equally as good, and in most cases better, with the only drawback being slight less fuel milage.
...

I believe the oil pumps are variable pumps that control oil flow when needed.

How oil pump works on new 6.2 gm engines - Bing

Intelligent search from Bing makes it easier to quickly find what you’re looking for and rewards you.

www.bing.com

https://gmauthority.com/blog/2025/05/should-you-use-0w-40-oil-in-your-non-recalled-gm-6-2l-l87-engine/

 

[rizzuto]

I believe the oil pumps are variable pumps that control oil flow when needed.

How oil pump works on new 6.2 gm engines - Bing

Intelligent search from Bing makes it easier to quickly find what you’re looking for and rewards you.

www.bing.com

https://gmauthority.com/blog/2025/05/should-you-use-0w-40-oil-in-your-non-recalled-gm-6-2l-l87-engine/