GM 6.2 recalled '21-'24
Lexus Champion
Joined: Oct 2019
Posts: 18,225
Likes: 1,774
From: Ohio
A lot to unpack.
-GM is recalling all engines within just those MYs, but the 2025s are not effected? Ok so is it a metallurgy issue or a lubrication issue?
-Effected owners have to bring the vehicle for an inspection. If the vehicle has a P0016 code automatic new long block great.
-Effected VINs without the code, just change to the thicker oil and wait and watch till what point in time? How much damage has the lack of oil done? One UOA (for clarity the UOA wont show the engines condition, more of how the oil is doing within the operating parameters) wont cover this, physical inspection of each engine torn down. Is the recall indefinite?
-Mobil 1 Full Saps Euro Oil now magically has DexosR certification?
This sounds like risk assessment came to the conclusion if we just wait out the warranty clock, its off our balance sheets. I assume some owners will run 0w20 till the motor stops and then go with a new block/thicker oil.
-GM is recalling all engines within just those MYs, but the 2025s are not effected? Ok so is it a metallurgy issue or a lubrication issue?
-Effected owners have to bring the vehicle for an inspection. If the vehicle has a P0016 code automatic new long block great.
-Effected VINs without the code, just change to the thicker oil and wait and watch till what point in time? How much damage has the lack of oil done? One UOA (for clarity the UOA wont show the engines condition, more of how the oil is doing within the operating parameters) wont cover this, physical inspection of each engine torn down. Is the recall indefinite?
-Mobil 1 Full Saps Euro Oil now magically has DexosR certification?
This sounds like risk assessment came to the conclusion if we just wait out the warranty clock, its off our balance sheets. I assume some owners will run 0w20 till the motor stops and then go with a new block/thicker oil.
Lexus Champion
Joined: Oct 2019
Posts: 18,225
Likes: 1,774
From: Ohio
Fuel economy junk ruins just about everything. Think about it..
-The economy-oriented 8 speed that made your LX feel lethargic to add one rated MPG for the brochure. The 6 speed LXs feel much spunkier and are considerably quicker. I wish you could drive mine and see for yourself.
-Start/stop on everything
-This with GMs premier engine being recalled
-As soon as GM started with AFM reliability dropped. Old 5.3s before that will last virtually forever.
-Lexus having all sorts of trouble with the 3.4tt in LS500, Tundra, etc. They gut the unstoppable V8 because of... fuel economy.
-Carbon buildup from direct injection
That's just off the top of my head, I'm sure I could think of plenty more examples.
It all sucks.
-The economy-oriented 8 speed that made your LX feel lethargic to add one rated MPG for the brochure. The 6 speed LXs feel much spunkier and are considerably quicker. I wish you could drive mine and see for yourself.
-Start/stop on everything
-This with GMs premier engine being recalled
-As soon as GM started with AFM reliability dropped. Old 5.3s before that will last virtually forever.
-Lexus having all sorts of trouble with the 3.4tt in LS500, Tundra, etc. They gut the unstoppable V8 because of... fuel economy.
-Carbon buildup from direct injection
That's just off the top of my head, I'm sure I could think of plenty more examples.
It all sucks.
Lead Lap
Joined: Mar 2015
Posts: 4,547
Likes: 354
From: In your head
https://www.gmdexos.com/brands/dexosr/index.html
https://www.mobil.com/en/lubricants/...bil-1-fs-0w-40
The mystery deepens even further. Now that I'm looking at Toyota's response to their V35s issues, Toyota has managed to do recalls better (and thats saying something since their hybrids with v35s are excluded).
Lexus Champion
Joined: Oct 2019
Posts: 18,225
Likes: 1,774
From: Ohio
You would think they'd cross spec only what works in the vette, but they basically added any and all x40 M1 products. Dont when the changeover approval happened, but the changes are not reflected by Mobil in their PDS.
https://www.gmdexos.com/brands/dexosr/index.html
https://www.mobil.com/en/lubricants/...bil-1-fs-0w-40
The mystery deepens even further. Now that I'm looking at Toyota's response to their V35s issues, Toyota has managed to do recalls better (and thats saying something since their hybrids with v35s are excluded).
https://www.gmdexos.com/brands/dexosr/index.html
https://www.mobil.com/en/lubricants/...bil-1-fs-0w-40
The mystery deepens even further. Now that I'm looking at Toyota's response to their V35s issues, Toyota has managed to do recalls better (and thats saying something since their hybrids with v35s are excluded).
I use it in literally all my cars other than the Jeep and Sequoia in 0w-30 and 0w-40 because it's near the best period and very affordable.
Last edited by Striker223; Apr 27, 2025 at 01:03 AM.
Lexus Test Driver
Joined: Apr 2012
Posts: 6,246
Likes: 472
From: Long Island
so is the fix just to switch to heavier weight oil? i'd hate to have the engine replaced just for the same issue to keep happening
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
Thread Starter
Lexus Champion
Joined: Jan 2012
Posts: 17,087
Likes: 514
From: Knoxville, TN
Like I said, ours is going in Tuesday.... if I'm entitled to a new engine I'll be getting one (not then). They're gonna be looking inside the engine and changing the oil with the new heavier stuff.
It sounds like this :could: be just using the wrong oil.... for...... fuel economy!!!!!!!!
Thinner oil, to me I feel like teeny bits of the rods/crankshaft/etc might shred microscopically which heavier oil would prevent.
If this was all simply because GM was specifying the wrong oil for fuel economy I'm going to laugh.
It sounds like this :could: be just using the wrong oil.... for...... fuel economy!!!!!!!!
Thinner oil, to me I feel like teeny bits of the rods/crankshaft/etc might shred microscopically which heavier oil would prevent.
If this was all simply because GM was specifying the wrong oil for fuel economy I'm going to laugh.
Last edited by AJT123; Apr 27, 2025 at 02:00 PM.
Lexus Fanatic
Joined: May 2012
Posts: 68,644
Likes: 4,046
From: Maryland
To be clear if it’s the oil it’s still an engineering problem. They didn’t properly engineer the engine to be able to use the 0W20 oil. Note MANY engines have been using 0W20 for many years, some now use 0W16 and there aren’t issues like this.
Lexus Champion
Joined: Oct 2019
Posts: 18,225
Likes: 1,774
From: Ohio
so is the fix just to switch to heavier weight oil? i'd hate to have the engine replaced just for the same issue to keep happening
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
Lexus Champion
Joined: Oct 2019
Posts: 18,225
Likes: 1,774
From: Ohio
The load is too high and change intervals are too long.
Lexus Champion
Joined: Oct 2019
Posts: 19,693
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From: California
The 6L GM the engines compression is probably way too high for 0W20
Last edited by AMIRZA786; Apr 27, 2025 at 03:45 PM.
Lead Lap
Joined: Mar 2015
Posts: 4,547
Likes: 354
From: In your head
so is the fix just to switch to heavier weight oil? i'd hate to have the engine replaced just for the same issue to keep happening
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
these are the kinds of problems i hope to avoid by running the heaviest recommended weight of oil for the benz which is 5W-40 and always driving very gently for the first few minutes of a drive... 'technically' 0W-30, 5W-30, and 0W-40 are all acceptable and shouldn't make problems but i never drive that car if it's really cold anyway so i'd rather prioritize the high temperature protection
for the 1UZ it's just classic 5W-30 of course
Lead Lap
Joined: Mar 2015
Posts: 4,547
Likes: 354
From: In your head
On a side note, I do wonder if they spec'd their own flavor of 0w20 would the issue still exist? BMW on their legendary b58 allows 0w20, and we know its compression is 11:1 and its FI; ideal motor to destroy with water for oil as some like to say. However, if you compare the industry spec of a 20 weight oil, its resistance to shearing under high temperatures and high load is at a 2.6, while BMW LL-01FE is at 3.0. This new spec of oil for reference GM is now spec has the industry rating of a minimum of 3.5.
Again I dont think we will know the impact of this GM recall until way later.
Lead Lap
Joined: Mar 2015
Posts: 4,547
Likes: 354
From: In your head
Plus Exxon Mobil being their trusted partner for oil it makes sense. Its interesting though they also got Mobil to release a new M1 0w40 oil in addition to M1 0w40 FS euro meeting their DexosR spec, which have never existed until this recall.
Last edited by coolsaber; Apr 27, 2025 at 04:11 PM.
Thread Starter
Lexus Champion
Joined: Jan 2012
Posts: 17,087
Likes: 514
From: Knoxville, TN