New bulletin/Campaign 6.2 L87

[tjonesdfw]

26 minutes ago, Foxglove said:

 

2025 owner's manual hasn't changed: "Viscosity Grade Use SAE 0W-20 viscosity grade engine oil for the 5.3L and 6.2L V8 engines."

Thanks.  So either they've modified something they refuse to disclose on '25 and up motors, OR more likely, they're just kicking the can further down the road and maybe those years will be added to this mess eventually too.  Either way, it doesn't help with my decision to go buy one anytime soon if still has the same parts and potential issue.    

[Blade8971]

Hmmm....a little bittersweet for me as I have a 2020 with the 6.2L which surprisingly is not on the recall list.  I would have thought they go back to 2019.  I have a scheduled oil change tomorrow at my GM dealer so I'll ask if I should be concerned with this recall.  I suspect anyone with a 6.2 who is not involved in this recall will want to keep tabs on this development.

[Grumpy Bear]

11 hours ago, Black02Silverado said:

If so then all of their engines would be going bad and GM would be out of business. The fact that it’s happening as early as 1,000 miles or sooner from new states to me an issue with either quality materials or assembly. 

 

It's bearings, correct? Under what régime are mains and rods lubricated? If there is sufficient 'film' then I ask by what mechanism are two parts that are not in contact wearing?  

 

What is the logical conclusion? Parts are touching parts that shouldn't be touching! And what ENGINEERING solution is GM offering? 

 

[Quote from Safety Recall N252494001]

 

[Close quote]

 

Oil won't fix a damaged motor so first they must pass inspection and once the unit has cleared? ENGINEERS determined that in a healthy motor more film = more protection...from? Parts touching parts that shouldn't be touching other parts. How do we get more film? VISCOSITY MATTERS. 

 

11 hours ago, Black02Silverado said:

To me, the fact that the years in question are failing early as in with only 1,000 mile from new on some. This would tell me that manufacturing has a flaw, either in assembly or metallurgy. If the assembly isn’t to specification or the quality of the metal is poor, no oil will fix it. Just a matter of time until it lets go. 

 

How many straws does it take to break a camels back?  Stribeck...what part of the Hersey equation changes between these two motors? (5.3 v 6.2) BMEP x leverage. Keep jacking up the load and lowering viscosity and eventually you cross a line. THE line. 

 

BMEP (More load), stop start (dry starts), taller gearing (lower velocity). Matched with lighter oil, hotter oil and water. How many straws does it take? Does it tell you in the manual to use a heavier oil when towing? 

 

If it were metallurgy they ALL would fail. Robots assemble these things now. Can a robot do randomly OPS? 

 

The ENGINEERS told you what the problem is...believe them. Protect the motor, not the warranty. Or not.... 

 

Funny that when a consumer increases viscosity it is the end of the world as we know it. "You can't do that, you will mess up the passive VVT controlled EGR and the AFM/DFM won't work right and break" they say. But it all works just fine when GM tells you to in a motor they didn't spec for it. 

 

People will argue with God to keep from being wrong so why stop with an engineer. They wont win, but they will try anyway.

 

 

 

 

 

[GETGONE]

Looked on My Chevrolet app and my 2021 Silverado Custom Trail Boss with the 6.2 shows this recall outstanding on it. Wonder how long before I get a letter from GM or call from the dealer to bring it in. I'm at about 31,600 miles with no issues. I changed the oil at about 1000 miles and have changed it at 6K miles since. I've put some strontium magnets on the bottom of the oil filter(Purolator Pure One or Boss) and cut the last two open after I bought the proper tool and I was surprised at the amount of metal paste on the bottom of the can where the magnets were stuck to. This was just the last two most recent oil changes. Wonder how bad it was on the first couple changes. I also get some pretty nasty looking gunk in the JLT catch can. Can't imagine that helps things any going back into the motor.

[Black02Silverado]

1 hour ago, Grumpy Bear said:

 

It's bearings, correct? Under what régime are mains and rods lubricated? If there is sufficient 'film' then I ask by what mechanism are two parts that are not in contact wearing?  

 

What is the logical conclusion? Parts are touching parts that shouldn't be touching! And what ENGINEERING solution is GM offering? 

 

[Quote from Safety Recall N252494001]

 

[Close quote]

 

Oil won't fix a damaged motor so first they must pass inspection and once the unit has cleared? ENGINEERS determined that in a healthy motor more film = more protection...from? Parts touching parts that shouldn't be touching other parts. How do we get more film? VISCOSITY MATTERS. 

 

 

How many straws does it take to break a camels back?  Stribeck...what part of the Hersey equation changes between these two motors? (5.3 v 6.2) BMEP x leverage. Keep jacking up the load and lowering viscosity and eventually you cross a line. THE line. 

 

BMEP (More load), stop start (dry starts), taller gearing (lower velocity). Matched with lighter oil, hotter oil and water. How many straws does it take? Does it tell you in the manual to use a heavier oil when towing? 

 

If it were metallurgy they ALL would fail. Robots assemble these things now. Can a robot do randomly OPS? 

 

The ENGINEERS told you what the problem is...believe them. Protect the motor, not the warranty. Or not.... 

 

Funny that when a consumer increases viscosity it is the end of the world as we know it. "You can't do that, you will mess up the passive VVT controlled EGR and the AFM/DFM won't work right and break" they say. But it all works just fine when GM tells you to in a motor they didn't spec for it. 

 

People will argue with God to keep from being wrong so why stop with an engineer. They wont win, but they will try anyway.

 

 

 

 

 

 

1 hour ago, Grumpy Bear said:

 

It's bearings, correct? Under what régime are mains and rods lubricated? If there is sufficient 'film' then I ask by what mechanism are two parts that are not in contact wearing?  

 

What is the logical conclusion? Parts are touching parts that shouldn't be touching! And what ENGINEERING solution is GM offering? 

 

[Quote from Safety Recall N252494001]

 

[Close quote]

 

Oil won't fix a damaged motor so first they must pass inspection and once the unit has cleared? ENGINEERS determined that in a healthy motor more film = more protection...from? Parts touching parts that shouldn't be touching other parts. How do we get more film? VISCOSITY MATTERS. 

 

 

How many straws does it take to break a camels back?  Stribeck...what part of the Hersey equation changes between these two motors? (5.3 v 6.2) BMEP x leverage. Keep jacking up the load and lowering viscosity and eventually you cross a line. THE line. 

 

BMEP (More load), stop start (dry starts), taller gearing (lower velocity). Matched with lighter oil, hotter oil and water. How many straws does it take? Does it tell you in the manual to use a heavier oil when towing? 

 

If it were metallurgy they ALL would fail. Robots assemble these things now. Can a robot do randomly OPS? 

 

The ENGINEERS told you what the problem is...believe them. Protect the motor, not the warranty. Or not.... 

 

Funny that when a consumer increases viscosity it is the end of the world as we know it. "You can't do that, you will mess up the passive VVT controlled EGR and the AFM/DFM won't work right and break" they say. But it all works just fine when GM tells you to in a motor they didn't spec for it. 

 

People will argue with God to keep from being wrong so why stop with an engineer. They wont win, but they will try anyway.

 

 

 

 

 

Then explain why it’s just the 2021-2024 6.2’s and not the entire engine line up running 0w-20.  Also include other manufacturers running 0w-20 and now 0w-16 and even 0w-8? Your logic states these all will self destruct. The salvage yards should be full of trashed engine vehicles. 

We don’t know what type of inspection is being performed. The only inspection I feel that is going to find the issue is a tear down and that’s not going to happen. 

 

[Grumpy Bear]

1 minute ago, Black02Silverado said:

 

Then explain why it’s just the 2021-2024 6.2’s and not the entire engine line up running 0w-20.  Also include other manufacturers running 0w-20 and now 0w-16 and even 0w-8? Your logic states these all will self destruct. The salvage yards should be full of trashed engine vehicles. 

We don’t know what type of inspection is being performed. The only inspection I feel that is going to find the issue is a tear down and that’s not going to happen. 

 

 

Young man you misunderstand. I have no need to prove anything. Keep doing what your doing. It will guarantee you will get the same results. 

 

I run Honda's on 5W20 for very long service lives. A 1.6 Honda HX is not the same as a GM 6.2 in any way but sharing the idea of being a ICE.  Why keep looking at all variables as if they are not?

 

I digress. What did GM ENGINEERS say the issue was and what the repair is? 

 

1 hour ago, Grumpy Bear said:

[Quote from Safety Recall N252494001]

 

[Close quote]

 

I said what I said. You are not arguing with me. Your argument is with GM. 

[Grumpy Bear]

Read my posts again. I said more viscous oil prevents parts from touching parts in an otherwise healthy engine BETTER. I stated oil can't fix a damage engine. That if it's healthy the cure was given by ENGINEERS. Yet the only part anyone heard was something I didn't say. Argue is what ya want to do. Not what I want to do. 

[customboss]

5 hours ago, Black02Silverado said:

 

Then explain why it’s just the 2021-2024 6.2’s and not the entire engine line up running 0w-20.  Also include other manufacturers running 0w-20 and now 0w-16 and even 0w-8? Your logic states these all will self destruct. The salvage yards should be full of trashed engine vehicles. 

We don’t know what type of inspection is being performed. The only inspection I feel that is going to find the issue is a tear down and that’s not going to happen. 

 

Grumpy’s never heard of a defective bearing or race. Someone educate him.

[OnTheReel]

Two things can be true. No doubt some manufacturing defects occurred. But nobody should believe thicker oil will fix that!
 

I bet GM views the 0w40 as a good hedge against future UNRELATED warranty claims in currently healthy motors. The 0w20 served its purpose shoving these trucks under the CAFE limbo bar. The only thing it costs them to change spec after that is a 10 cent oil cap. Cheap insurance?

[carguy1701]

22 hours ago, tjonesdfw said:

Thanks.  So either they've modified something they refuse to disclose on '25 and up motors, OR more likely, they're just kicking the can further down the road and maybe those years will be added to this mess eventually too.  Either way, it doesn't help with my decision to go buy one anytime soon if still has the same parts and potential issue.    

 

22 hours ago, Foxglove said:

 

2025 owner's manual hasn't changed: "Viscosity Grade Use SAE 0W-20 viscosity grade engine oil for the 5.3L and 6.2L V8 engines."

But it HAS been changed: part of the inspection, regardless of pass or fail, is to put an insert in the owner's manual stating to use 0W-40 oil in the 6.2L, as well as a new oil cap with 0W-40 on it.

 

I'll also point out that (allegedly) the LT2 in the C8 shares bearings (down to the part number) with the L87, but the Vettes aren't being recalled, and that 0W-40 has been used in the LT1/2/4/5 since MY 2019 with no apparent issues (and we all know how vocal Corvette guys can be). I'm thinking this is a combination of supplier screwup and fuel mileage greed biting them in the arse. I have a hard time believing that 877k engines were manufactured with whatever this flaw is without someone on the assembly line noticing something was amiss...but then again stupider things have happened.

Edited April 26, 2025 by carguy1701
misspelling

[carguy1701]

9 hours ago, GETGONE said:

Looked on My Chevrolet app and my 2021 Silverado Custom Trail Boss with the 6.2 shows this recall outstanding on it. Wonder how long before I get a letter from GM or call from the dealer to bring it in. I'm at about 31,600 miles with no issues. I changed the oil at about 1000 miles and have changed it at 6K miles since. I've put some strontium magnets on the bottom of the oil filter(Purolator Pure One or Boss) and cut the last two open after I bought the proper tool and I was surprised at the amount of metal paste on the bottom of the can where the magnets were stuck to. This was just the last two most recent oil changes. Wonder how bad it was on the first couple changes. I also get some pretty nasty looking gunk in the JLT catch can. Can't imagine that helps things any going back into the motor.

Oof. Have you had a UOA done?

[brianf60]

So now I need to start buying Dexos R 0w40 oil? A quick Google search says they only Mobile 1 makes this. I can’t wait to spend twice as much on oil every time I change my oil. 

[MrLeadFoot]

1 hour ago, brianf60 said:

So now I need to start buying Dexos R 0w40 oil? A quick Google search says they only Mobile 1 makes this. I can’t wait to spend twice as much on oil every time I change my oil. 

Doesn't sound like it's more expensive at all compared to the 0w-20

 

0w-40:

https://www.walmart.com/ip/Mobil-1-FS-European-Car-Formula-Full-Synthetic-Motor-Oil-0W-40-5-Quart/23636902?wmlspartner=wlpa&selectedSellerId=0&selectedOfferId=85CF50B8BB3E4853BCFD4C0DAB7F857D&conditionGroupCode=1&wl13=1760&gclsrc=aw.ds&adid=2222222227723636902_117755028669_12420145346&wl0=&wl1=g&wl2=c&wl3=501107745824&wl4=pla-394283752452&wl5=9032443&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=local&wl12=23636902&veh=sem_LIA&gclsrc=aw.ds&gad_source=1&gbraid=0AAAAADmfBIqwDfZckf6JmDVkP7hU86viL&gclid=Cj0KCQjwiLLABhCEARIsAJYS6ulRkMFRkG_ODHIT7vpzHBRYuxQ5cButPZ2IXPJgxPV-upUos1hTOfUaAqOOEALw_wcB

 

0w-20:

https://www.walmart.com/ip/Mobil-1-Advanced-Fuel-Economy-Full-Synthetic-Motor-Oil-0W-20-5-Quart/17034374?classType=VARIANT&athbdg=L1200&adsRedirect=true

Edited April 26, 2025 by MrLeadFoot

[PunchT37]

Prolly don`t even need to do 0w40. One can get his HTHS number up from a 2.7 to a 3..2 to 3.5 with a 5w30 or 10w30. Gotta keep parts separated, as Grumpy says. Me too.

 

I`ve been running 5w30 in my `25 5.3 since 600 miles. No problems. But, it`s not a 420hp 460tq engine. High performance needs higher film strength. Period.

[Byrds8]

58 minutes ago, MrLeadFoot said:

Doesn't sound like it's more expensive at all compared to the 0w-20

 

0w-40:

https://www.walmart.com/ip/Mobil-1-FS-European-Car-Formula-Full-Synthetic-Motor-Oil-0W-40-5-Quart/23636902?wmlspartner=wlpa&selectedSellerId=0&selectedOfferId=85CF50B8BB3E4853BCFD4C0DAB7F857D&conditionGroupCode=1&wl13=1760&gclsrc=aw.ds&adid=2222222227723636902_117755028669_12420145346&wl0=&wl1=g&wl2=c&wl3=501107745824&wl4=pla-394283752452&wl5=9032443&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=local&wl12=23636902&veh=sem_LIA&gclsrc=aw.ds&gad_source=1&gbraid=0AAAAADmfBIqwDfZckf6JmDVkP7hU86viL&gclid=Cj0KCQjwiLLABhCEARIsAJYS6ulRkMFRkG_ODHIT7vpzHBRYuxQ5cButPZ2IXPJgxPV-upUos1hTOfUaAqOOEALw_wcB

 

0w-20:

https://www.walmart.com/ip/Mobil-1-Advanced-Fuel-Economy-Full-Synthetic-Motor-Oil-0W-20-5-Quart/17034374?classType=VARIANT&athbdg=L1200&adsRedirect=true

According to that 0W40 oil you listed, it's not Dexos R certified. No where on the bottle does it state or mention it. The only one that does that I have found is Mobil 1 Supercar. I found some local on sale for $8.99qt. Still more expensive than the Pennzoil Platinum 0W20 I was using.