New bulletin/Campaign 6.2 L87

[MrLeadFoot]

1 hour ago, Byrds8 said:

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.

Oh crap, I didn't know it was a specially designated oil. Is there an actual difference between "R" and "non-R", or is it marketing hype? 

[GETGONE]

1 hour ago, Byrds8 said:

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.

https://www.gmdexos.com/brands/dexosr/index.html

[MrLeadFoot]

How interesting that even the SuperCar formula doesn't mention "dexos R" anywhere on the bottle, front or back, unless I am blind (which is entirely possible).

[PunchT37]

9 minutes ago, MrLeadFoot said:

How interesting that even the SuperCar formula doesn't mention "dexos R" anywhere on the bottle, front or back, unless I am blind (which is entirely possible).

Don`t worry about Dexos. Get some real oil in that thing.

[PunchT37]

They were so worried about Dexos 1 gen 3. Better have it for spec AND warranty. Then, they went against themselves.

 

Couldn`t have been that damn important.

[GETGONE]

34 minutes ago, PunchT37 said:

They were so worried about Dexos 1 gen 3. Better have it for spec AND warranty. Then, they went against themselves.

 

Couldn`t have been that damn important.

Please note: GM dexos R engine oils meet or exceed the performance of GM dexos 2 and GM dexos 1 Gen 2 and Gen 3 oils and are backward compatible, therefore vehicles equipped with gasoline engines that used GM dexos 2, or GM dexos 1 Gen 2 or Gen 3 may use a GM dexos R licensed engine oil of the appropriate viscosity grade at their next oil change.

[Byrds8]

Yeah I saw the gmdexos website. But when reading the bottles they don’t even mention dexos or have the emblem. 
 

I thought the Supercar said it. My bad, maybe it doesn’t.  It does have the dexosR emblem on it though. 

Edited April 27, 2025 by Byrds8

[Bruce Rinehart]

Of course all stuff with the 6.2 comes out fully after I bought a 22 GMC Serria with 33k miles on it. It seems to run just fine, but I won't use the oil % thing at all ,going to change every 4k from now on and use a upper cylinder lubricant in the fuel also disable the DMF. It came with no auto stop and glad about that. There is just to much going on with that deactivation of cylinders and I think it causes it's own problems. I bought a V-8 and going to drive one, the mileage is low 20's and I'm good with that. P.S. the 6.2 is a blast to drive

Edited April 27, 2025 by Bruce Rinehart
spelling

[Snow White]

the engines are not completely assembled by robots to my knowledge, some of my friends worked on the lines at delphi in lockport and some at tonawanda about the time robotic hands came into the mix.... but i'm not exactly sure about the engines.  regardless, to reduce repetitive strain on wrenching, people wear robotic hands that probably turn the cap bolts in this instance to a specified rotation or a torque.  the problem is the torque is being reached for the wrong reason, the bore is too small.  tear downs are finding rod bores thousands, many thousands too small and wasting bearings before the 1st oil change or up to 35k miles-ish depending how many thousands the bore is out.  not many people do oil analysis, I am only at 2500 miles so my next oil change is coming in 1500 miles.  did the 1st one at 1000.  looked like normal wear but i'm a september build.  it does have an unnerving rod knock sound but that could be a lot of things.  next oil change will be 0-40 and i'll be interested if the knock goes away.  i also run a range technology on our yukon 6.2. to eliminate dfm and start stop.

 

knowing how delphi was, i doubt there's qc on the rod bore cause it'd really slow down the process.  if every rod bore had a diameter check on it, somebody would be intentionally letting them by..... at this volume that is highly unlikely and it'd be a specific vin range based on a certain shift.

 

the oil change just gets the ones failing around the warranty mark to get passed the warranty mark and attempts to appease NHTSA.  this should have little impact on a quality class action suit because, they should be offering a 100,000 mile warranty if they believe it's the actual fix.  that'll be the outcome of the lawsuits which is still cheaper than engine replacement...

 

oil analysis and out of round crank rotation or piston travel are the ways to check this, but realistically the pan has to be dropped.  they could put a gauge in plug and check to see if the piston travel is less than expected by thousands and directly correlate that to an out of tolerance bearing.

[Grumpy Bear]

18 hours ago, OnTheReel said:

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?

 

Absolutely! But what it can't be, is absolute and also random if we are going to make the unfounded claim the it is "metallurgy'. Lack of foundation your Honor!  Absolute and random are incompatible. And I don't think I've heard anyone say the failure rate is 100%. Or even 10%. You couldn't get GM to say if they had a mouthful. 

 

I also haven't hear @newdude offer his observations made during teardowns and/or warranty inspections. If someone has 'real' recon on this....this would be our guy....right? Dirt? Clearance issue? Batch specific metallurgy would have been traced and trapped by now and those specific units recalled. They may not be telling him Diddly but he has eyes and is quite capable of unbiased observations. 

 

What has my feathers ruffled is so called "Science Guys" reading chicken bones sprinkled with bat blood chanting Vo Doo mumbo jumbo looking for sign. It also irks me that they like to "Say a thing to truth". Make false claims about what is and isn't said and building arguments based on unrealities. He's a member of the KKK. I have no proof but If I say it so, its so. All very Trumpian. 

 

 

[Snow White]

they are being toredown and found many thousands smaller than spec.  I had a video clip of a couple, i'll try to find the link.

[Grumpy Bear]

9 hours ago, GETGONE said:

Please note: GM dexos R engine oils meet or exceed the performance of GM dexos 2 and GM dexos 1 Gen 2 and Gen 3 oils and are backward compatible, therefore vehicles equipped with gasoline engines that used GM dexos 2, or GM dexos 1 Gen 2 or Gen 3 may use a GM dexos R licensed engine oil of the appropriate viscosity grade at their next oil change.

 

Almost all the "improvement" as these standards progress is rooted in cleanliness testing and lowering NOACK values. And these 'improvements' are fractional. The R spec oil difference is not the HTHS value. In fact is sits right at the very bottom of the J300 spec for its classification. What is different the ZDDP level. 900 ppm minimum both Zn and Phos, W40 oils are not subject to the SP limits And it's SSI value (Shear Stability Index). A quirky little ambiguous value that says I suffer little "permanent shear" but who knows how much "temporary"...the part used to qualify "Energy Conserving". What some call a 'feature" that I call a flaw. 

 

This non-sensical word salad is why I pay little attention to licensing and a lot to testing.  

 

18 minutes ago, butzers09silverado said:

they are being toredown and found many thousands smaller than spec.  I had a video clip of a couple, i'll try to find the link.

 

Well, that will wipe a bearing out.  Yea, oil won't fix that. Guess that is why they said "after inspection'. 

 

Point of clarity. Bearing clearances generally follow the formula a thou per inch of diameter and have since the dawn of the ICE. "Many" thousands and it would be locked upon assembly. Half a thou under minimum is killer. Yea, I know, it's the Internet. 

 

 

Edited April 27, 2025 by Grumpy Bear

[customboss]

2 hours ago, butzers09silverado said:

the engines are not completely assembled by robots to my knowledge, some of my friends worked on the lines at delphi in lockport and some at tonawanda about the time robotic hands came into the mix.... but i'm not exactly sure about the engines.  regardless, to reduce repetitive strain on wrenching, people wear robotic hands that probably turn the cap bolts in this instance to a specified rotation or a torque.  the problem is the torque is being reached for the wrong reason, the bore is too small.  tear downs are finding rod bores thousands, many thousands too small and wasting bearings before the 1st oil change or up to 35k miles-ish depending how many thousands the bore is out.  not many people do oil analysis, I am only at 2500 miles so my next oil change is coming in 1500 miles.  did the 1st one at 1000.  looked like normal wear but i'm a september build.  it does have an unnerving rod knock sound but that could be a lot of things.  next oil change will be 0-40 and i'll be interested if the knock goes away.  i also run a range technology on our yukon 6.2. to eliminate dfm and start stop.

 

knowing how delphi was, i doubt there's qc on the rod bore cause it'd really slow down the process.  if every rod bore had a diameter check on it, somebody would be intentionally letting them by..... at this volume that is highly unlikely and it'd be a specific vin range based on a certain shift.

 

the oil change just gets the ones failing around the warranty mark to get passed the warranty mark and attempts to appease NHTSA.  this should have little impact on a quality class action suit because, they should be offering a 100,000 mile warranty if they believe it's the actual fix.  that'll be the outcome of the lawsuits which is still cheaper than engine replacement...

 

oil analysis and out of round crank rotation or piston travel are the ways to check this, but realistically the pan has to be dropped.  they could put a gauge in plug and check to see if the piston travel is less than expected by thousands and directly correlate that to an out of tolerance bearing.

You sound informed. If this is the case NO lubricant will solve. Just DELAY. INEVITABLE 

[Snow White]

https://forums.dealersedge.com/viewtopic.php?f=3&t=13098

 

one example, they're not particularily easy to find though, the tear downs.

[Black02Silverado]

AMSOIL's Signature Series 0w-40 was originally blended for the MOPAR Hellcat engine and Nissan GT-R, but it also meets/exceeds the dexos specification and would work well in place of Mobil 1 R.  Plus you can get it delivered to your door.  I run a special for all GM-Trucks members, just PM me for the information. I can't post it in public per AMSOIL.

 

0W-40 (AZF): API SP, SN PLUS, SN…; Chrysler MS-A0921, MS-12633, MS-10725,
MS-10850; Nissan GT-R; GM dexos R

 

https://www.amsoil.com/p/amsoil-signature-series-0w-40-100-synthetic-motor-oil-azf/?zo=521390

 

 

 

Edited April 27, 2025 by Black02Silverado