0-20w oil

[15burban]

Their reasoning has absolutely nothing to to with it being the best oil for engine longevity.

As long as the oil is good enough to make the engine last til the warranty is done is all they care about. Once it's out of warranty they could care less if it locks up.

 

[Antonm]

As long as the oil is good enough to make the engine last til the warranty is done is all they care about. Once it's out of warranty they could care less if it locks up.

You can't get around regulatory requirements. You either meet them, or you don't get to sell your cars in the US. There is no negotiations, no exceptions, no allowances for anything.

And it is a federal requirement that they warranty the emissions control devices for 100K miles, not the engines, not the transmissions, the emissions control devices.

So if you were the CEO of a major auto manufacturer, what would you do? You'd probably meet all the requirements so you could sell cars, and then make darn sure the emission control devices lasted at the cost of literally everything else. Because that's how you make money, and at the end of the day, you're in business NOT to make cars, you're in business to make money.

If the government wasn't getting in the way, the car manufactures would make cars that lasted longer because reputation flat sells cars. How many people out there buy Toyota's for no other reason than reputation, and they pay a premium for those low option vehicles too.

So don't blame the greedy car companies, blame the idiots that have literally no clue what they're talking about that make the regulations.
...

 

[15burban]

It is my understanding that there isn't any requirement by anyone other then the vehicle manufacturer for what oil to use in their vehicles. 0w20 they say gives you better mpg. Even if it's .10 mpg better which doesn't seem like a lot to a single person adds up over all the vehicles the manufacturer sells with said engine. So in a round about way it's sort of right, but it's not necessarily because someone besides the manufacturer says they have to use 0w20 or they can't sell their vehicles.

 

[Stbentoak]

You can't get around regulatory requirements. You either meet them, or you don't get to sell your cars in the US. There is no negotiations, no exceptions, no allowances for anything.

And it is a federal requirement that they warranty the emissions control devices for 100K miles, not the engines, not the transmissions, the emissions control devices.

So if you were the CEO of a major auto manufacturer, what would you do? You'd probably meet all the requirements so you could sell cars, and then make darn sure the emission control devices lasted at the cost of literally everything else. Because that's how you make money, and at the end of the day, you're in business NOT to make cars, you're in business to make money.

If the government wasn't getting in the way, the car manufactures would make cars that lasted longer because reputation flat sells cars. How many people out there buy Toyota's for no other reason than reputation, and they pay a premium for those low option vehicles too.

So don't blame the greedy car companies, blame the idiots that have literally no clue what they're talking about that make the regulations.
...

Emissions controls components are only FULLY warranted for 2 years 24k miles. Then only certain components are warrantied for the 8/80 or 10/100 duration, FYI.

 

[Antonm]

Emissions controls components are only FULLY warranted for 2 years 24k miles. Then only certain components are warrantied for the 8/80 or 10/100 duration, FYI.

The 2/24 is an emissions performance warranty (really means nothing as the car is usually under the manufacturer's warranty at the same time), the 8/80 and 10/100 are the component warranty and yes different things are covered under each, but the expensive things (like the catalytic converter and, strangely enough, the ECU) are covered under these longer terms.

So, you're the CEO of a major automaker with no choice but to cover warranty on expensive emissions parts until 8/80 or 10/100, and oh, by the way, these parts are damaged by the anti wear additives used in the engine oil. What do you pick to last the longest, the engine that has a voluntary 3/36 warranty, or the emissions control equipment that has a government mandated 8/80 or 10/100 warranty?

So far it looks likes the automakers have picked the emissions control devices because they keep taking anti-wear additive out of their "approved" oils.
...

 

[Georgia 4Low]

I wish there was a 5w-30 Dexos D, so I could just run it and see if my Tahoe stops using a quart between (short) oil changes.

Our 2022 Yukon 4x4 SLE would use just about 3/4 of a quart of oil at about 40% oil life remaining or approx. 5000k miles ever since new with using AC Delco DEXOS D 0W-20. Currently has 28k miles and I'm on my 2nd oil change with Mobil 1 X2ESP DEXOS D 0w-20 and oil consumption appears to have disappeared. I have performed every oil change on it since new at basically 40% oil life or 5000k miles. So far our Yukon really likes the Mobil oil. Driving conditions for the 28k miles is purely in town and highway with a few long trips made, no towing. The wife drives it kind of hard at times as well.

What oil have you been using?

 

[StephenPT]

Our 2022 Yukon 4x4 SLE would use just about 3/4 of a quart of oil at about 40% oil life remaining or approx. 5000k miles ever since new with using AC Delco DEXOS D 0W-20. Currently has 28k miles and I'm on my 2nd oil change with Mobil 1 X2ESP DEXOS D 0w-20 and oil consumption appears to have disappeared. I have performed every oil change on it since new at basically 40% oil life or 5000k miles. So far our Yukon really likes the Mobil oil. Driving conditions for the 28k miles is purely in town and highway with a few long trips made, no towing. The wife drives it kind of hard at times as well.

What oil have you been using?

This is really great info. I also have a '22 Yukon w/ Duramax and have done 3 oil changes myself using AC Delco 0W-20 Dexos-D since brand new. First one at 1.3K, then every 4.5K thereafter.

I notice some oil consumption when towing and also long highway trips. We just got back from a ~2K mile road trip to California. I'm down about 3 x-hatch sections (it was full when we left). I had always thought the AC Delco oil was rebadged Mobil ESP oil, but perhaps it's not. I think I'll try the Mobil ESP oil now that it seems to be readily available through Walmart.

 

[Georgia 4Low]

This is really great info. I also have a '22 Yukon w/ Duramax and have done 3 oil changes myself using AC Delco 0W-20 Dexos-D since brand new. First one at 1.3K, then every 4.5K thereafter.

I notice some oil consumption when towing and also long highway trips. We just got back from a ~2K mile road trip to California. I'm down about 3 x-hatch sections (it was full when we left). I had always thought the AC Delco oil was rebadged Mobil ESP oil, but perhaps it's not. I think I'll try the Mobil ESP oil now that it seems to be readily available through Walmart.

maybe changing oil brands will help you like it did ours but there are a lot of variables like driving conditions, climate, the engine itself, etc. In my experience with all the vehicles I've owned some engines just prefer a certain oil over others. The only reason I switched to the Mobil 1 oil is that Auto Zone started carrying the Mobil DEXOS D oil and I got tired of ordering AC Delco online.

 

[dbphillips]

Our 2022 Yukon 4x4 SLE would use just about 3/4 of a quart of oil at about 40% oil life remaining or approx. 5000k miles ever since new with using AC Delco DEXOS D 0W-20. Currently has 28k miles and I'm on my 2nd oil change with Mobil 1 X2ESP DEXOS D 0w-20 and oil consumption appears to have disappeared. I have performed every oil change on it since new at basically 40% oil life or 5000k miles. So far our Yukon really likes the Mobil oil. Driving conditions for the 28k miles is purely in town and highway with a few long trips made, no towing. The wife drives it kind of hard at times as well.

What oil have you been using?

That's disturbing. I've been using dealer changes, so hopefully AC Delco. The thing is, if they were using the wrong oil, I would expect it to be 5w-30, hopefully synthetic.

*Also, Bob9280 says he has same consumption issue with Mobil 1... https://www.tahoeyukonforum.com/threads/2022-denali-oil-comsumption.147628/

 

[Georgia 4Low]

That's disturbing. I've been using dealer changes, so hopefully AC Delco. The thing is, if they were using the wrong oil, I would expect it to be 5w-30, hopefully synthetic.

*Also, Bob9280 says he has same consumption issue with Mobil 1... https://www.tahoeyukonforum.com/threads/2022-denali-oil-comsumption.147628/

seems he has a 6.2L gas engines as well and not the Duramax. doesn't hurt to try a different DEXOS D for your Duramax and see if that helps.

 

[StephenPT]

My theory is that the engine oil peak operating temp of the LM2 is in a range that the kinematic viscosity is thin enough that it slips by rings, turbocharger seals, etc. At 0W-20, the oil is already "thin" and when you run the oil at 220F+ unloaded and towing 240F+ temps you're more likely to use oil. It takes the engine ~45min to start seeing the 220F+ oil temps, so if you're not driving on extended road trips you won't see any consumption based on driving unloaded. Towing oil temps rise quickly, but usually towing is limited to a few hundred miles here and there and not a daily occurrence.

It's interesting though that Georgia 4Low saw oil consumption using AC Delco 0W-20 but isn't seeing it with the same weight (different brand). Perhaps the Mobil ESP 0W-20 formulation reacts differently to the higher oil temps? It's certainly worth a try on my end to make the switch as the oil is still Dexos-D rated and I don't have to worry about voiding the warranty...

 

[15burban]

The mobil 0w20 could possibly be a "heavier" 20 weight. A guy would have to lookup the specs of it compared to the ac delco. Just like the ac delco could be on the thinner side of a 20 weight. I'm not saying they are but it's a possibility.

 

[Stbentoak]

My theory is that the engine oil peak operating temp of the LM2 is in a range that the kinematic viscosity is thin enough that it slips by rings, turbocharger seals, etc. At 0W-20, the oil is already "thin" and when you run the oil at 220F+ unloaded and towing 240F+ temps you're more likely to use oil. It takes the engine ~45min to start seeing the 220F+ oil temps, so if you're not driving on extended road trips you won't see any consumption based on driving unloaded. Towing oil temps rise quickly, but usually towing is limited to a few hundred miles here and there and not a daily occurrence.

It's interesting though that Georgia 4Low saw oil consumption using AC Delco 0W-20 but isn't seeing it with the same weight (different brand). Perhaps the Mobil ESP 0W-20 formulation reacts differently to the higher oil temps? It's certainly worth a try on my end to make the switch as the oil is still Dexos-D rated and I don't have to worry about voiding the warranty...

As an opinion, I believe they are the exact same oil, bottled on the same line, and the only difference is the green dye they put in the Mobil to differentiate. Why would they want to mess with the formulation? Both work and both conform, and both come from the same big tank at the Mobil factory....

 

[StephenPT]

As an opinion, I believe they are the exact same oil, bottled on the same line, and the only difference is the green dye they put in the Mobil to differentiate. Why would they want to mess with the formulation? Both work and both conform, and both come from the same big tank at the Mobil factory....

I believe your opinion is indeed fact.

Since I made that post I did some more research - I looked up the MSDS for the AC Delco oil - guess who the manufacturer is....

ExxonMobil

 

[pa31p]

May help some people out, hence posting to this old thread. But there’s a service bullitin on the duramax 3.0 for oil consumption on 2020-2022 units. most probably out of warranty now but camshaft housing has an internal baffle issue on certain units.

Also glow plug #2 failure has a relation to this.

21-NA-272 is the bullitin