GM 6.2L L92 - Removed Oil Pan Again

[jetman]

2007 Yukon Denali w/211k mile 6.2L L92. It doesn't leak or consume any oil. 81k miles ago in 2018, I did a piston/combustion chamber soak, rear main seal, & TSB 10-06-01-008M when we bought the vehicle. Rings were stuck when we bought it.

Its been 11k miles since the oil pan was last off/cleaned-out last August (not 11k on oil).

To clean the the internal surfaces that I can't easy reach, I've been running a mixture of 50% Valvoline Premium Blue "Restore" 10w-30 and 50% Mobil1 FS Euro 0w-40. This is the 3rd oci and the 3rd summer in a row that I've dropped the oil pan to see/clean-out debris that the oil is removing. Pics below. This time there wasn't much debris, so I won't be pulling the pan in the future for inspection/clean-out.

At next oil change I'll switch to 1 of 3 oils I have, either Amsoil, HPL, or Valvoline Restore and Protect? to be determined

here's the debris from last 3 pan drops:

@Brian123

 

[97K15004WD]

Nice work!

 

[Urshurak776]

Very nice! If it were me, I would just use the Valvoline Restore and Protect going forward. Save the HPL's and the AMSOIL's for newer vehicles. The R&P will keep this vehicle floating along for you, without the big expense. That's just me though. YMMV.

 

[AZjeff]

Wow. So you bought it with 130k miles? Was it using oil then? Any thoughts on how it got to such a state of internal grunge?

 

[wemay]

Nice work. I'd go VRP for great cleaning and being a bit cheaper than the other two. But you won't go wrong with any.

 

[buster]

Move to VRP. It can free stuck rings in just 2 oil changes. Valvoline Premium Blue Restore is a one time use product. The ester/solvency is so high (60% group V) it is likely not good for seals long term.

 

[crashz]

Great job with the cleaning and thanks for sharing the pictures!

Of the choices you listed, none are bad, but the VRP may be cheaper anyway. I imagine you'll want to continue with short OCIs to keep flushing the carbon out, so why waste the money on the boutiques.

 

[AdmiralYoda]

Yeah with the mileage on that motor I'd just go with VRP 5W-30 as the forever oil. 3k mile OCI's for mixed use and maybe 5k miles if its mostly highway.

Perhaps think about adding a can of BG's EPR 109 flush right before every oil change to try and clean it up a bit faster.

 

[Urshurak776]

Move to VRP. It can free stuck rings in just 2 oil changes. Valvoline Premium Blue Restore is a one time use product. The ester/solvency is so high (60% group V) it is likely not good for seals long term.

YMMV on number of changes to free stuck rings. Valvoline advertises 4 OCI's, but also say it could take longer. My sons Santa Fe used about 1/2 a quart in 4K miles. Took a full 4 OCI's (4K miles each) to get better. I didn't think it was working at all in fact. Now, he is almost through the 5th OCI, and car hasn't lost a drop of oil. So, each car will be different. Some cars may take more than 5 or 6 OCI's. Some cars even use MORE oil after a couple changes of R&P, but keep going and it does get better.

 

[buster]

YMMV on number of changes to free stuck rings. Valvoline advertises 4 OCI's, but also say it could take longer. My sons Santa Fe used about 1/2 a quart in 4K miles. Took a full 4 OCI's (4K miles each) to get better. I didn't think it was working at all in fact. Now, he is almost through the 5th OCI, and car hasn't lost a drop of oil. So, each car will be different. Some cars may take more than 5 or 6 OCI's. Some cars even use MORE oil after a couple changes of R&P, but keep going and it does get better.

Yes that is true I should have said it will vary. In one instance the Valvoline tech director Dr Warholic was surprised VRP unstuck rings after 2 OCI but it's very specific.