Oil consumption between changes

[WalleyeMikeIII]

Could be DFM related in your case. Long drives on highway is where DFM kicks in most, as it doesn’t take much engine power to keep you moving down the road at high speed…your engine in this case probably not operating at high speed…likely 1300-1600 rpm…

 

[Vladimir2306]

Could be DFM related in your case. Long drives on highway is where DFM kicks in most, as it doesn’t take much engine power to keep you moving down the road at high speed…your engine in this case probably not operating at high speed…likely 1300-1600 rpm…

Just not, as far as I remember from past generations, AFM does not work at speeds over 140 km / h, I think DFM is the same. Moreover, at a speed of 170, the car rarely goes to the maximum 10th gear. Most often it is the 8th or 9th. Therefore, the engine speed is visible in the photo. 3500)))) This is a lot) and this is strange, because usually the car should have enough power to move at maximum speed in the maximum automatic transmission gear. But here it feels like it's missing.

 

[WalleyeMikeIII]

Good grief, where can you drive sustained at those speeds?

Honestly, at those speeds continuous, kind of wondering if 0W-20 is the right oil?

 

[Marky Dissod]

AFM does not work at speeds over 140 km / h, I think DFM is the same. Moreover, at a speed of 170, the car rarely goes to the maximum 10th gear. Most often it is the 8th or 9th. Therefore, the engine speed is visible in the photo. 3500)))) This is a lot) and this is strange, because usually the car should have enough power to move at maximum speed in the maximum automatic transmission gear. But here it feels like it's missing.

AFM = either V4 mode, or V8 mode
DFM = 17 different engine firing orders ranging from V2 mode all the way through V8 mode

If it doesn't need all 8 cylinders, it will not use all 8 cylinders.
If it has to use 9th or 8th gear in order to use fewer cylinders, it will try to do that too.

That may very well be why you feel a miss.

 

[Marky Dissod]

Good grief, where can you drive sustained at those speeds?

Honestly, at those speeds continuous, kind of wondering if 0W-20 is the right oil?

I agree completely.
Sustained driving at such speeds, I'd be surprised if it used 10th gear; 9th or 8th would be more likely.

Also, at such sustained speeds, 0W30 seems like a wiser choice, at least until you can disable
V2 mode
V3 mode
V4 mode
V5 mode
V6 mode
& V7 mode.

 

[Vladimir2306]

Good grief, where can you drive sustained at those speeds?

Honestly, at those speeds continuous, kind of wondering if 0W-20 is the right oil?

In Russia, we have high-speed roads that allow you to drive between large cities in this way))

 

[Vladimir2306]

AFM = either V4 mode, or V8 mode
DFM = 17 different engine firing orders ranging from V2 mode all the way through V8 mode

If it doesn't need all 8 cylinders, it will not use all 8 cylinders.
If it has to use 9th or 8th gear in order to use fewer cylinders, it will try to do that too.

That may very well be why you feel a miss.

I just noticed that the tahoe is k2xx with a 6,2 engine. 6automatic transmission. At a speed of 170, I consumed 19-20 liters per 100 km and drove at this speed in the highest 6th gear. And the Yukon is also 6,2 but 10 automatic transmission. It travels in 8th and 9th gear and consumes 22-23 liters per 100 km / h at 170 km/h. It also eats more oil. While k2xx butter did not consume so much. Although the oil was 0-w20 here and there

 

[Vladimir2306]

I agree completely.
Sustained driving at such speeds, I'd be surprised if it used 10th gear; 9th or 8th would be more likely.

Also, at such sustained speeds, 0W30 seems like a wiser choice, at least until you can disable
V2 mode
V3 mode
V4 mode
V5 mode
V6 mode
& V7 mode.

It is too difficult to change the oil before each trip to a thicker one))) In addition, our servicemen strictly prohibit pouring oil other than 0-w20

 

[B-train]

I think the amsoil might be TOO slippery, if that's possible, and get past the rings. Just speculation.

But, I can say, just using regular 5w-30 synthetic oil for 90k miles on my 2017 6.2L doesn't use a drop in anywhere from 4500 to 6k when I change it.

Also, 0w-20 is recommended to help meet CAFE numbers, not give you long engine life. Do yourself a favor and just run a good 5w-30 like the commercial 6.6L gas motor requires from the factory. SAME architecture, just designed for a life of work.
For what it's worth....

 

[Vladimir2306]

I think the amsoil might be TOO slippery, if that's possible, and get past the rings. Just speculation.

But, I can say, just using regular 5w-30 synthetic oil for 90k miles on my 2017 6.2L doesn't use a drop in anywhere from 4500 to 6k when I change it.

Also, 0w-20 is recommended to help meet CAFE numbers, not give you long engine life. Do yourself a favor and just run a good 5w-30 like the commercial 6.6L gas motor requires from the factory. SAME architecture, just designed for a life of work.
For what it's worth....

As I understand it, the 6.2 engine from the K2XX generation, and the 6.2 engine from the T1 generation, have in common only in the working volume. These are slightly different engines, with different modes of operation. The same AFM on K2XX and DFM on T1 work differently. On K2XX, I drove about 150 thousand km on 0-W20 oil, and the consumption was always the same. This is about 1 liter per 12 thousand km. Therefore, I have a feeling that switching to X-W30 oil will not give a change in oil consumption