Under valve cover pics on my Sierra

[I<3oil]

I’m just paranoid with dropping 2 lifters back to back, 6 months 2 days, and 7,500 miles apart.

If it did, it would be due to GM quality, not oil.

 

[BrendanC]

I’m just paranoid with dropping 2 lifters back to back, 6 months 2 days, and 7,500 miles apart.

i run almost 20 of these motors on 5w30 without issue. just had a truck do 11.7K miles on HPL PCEO 5w30. truck has 130k on it.

 

[That John dude]

If it did, it would be due to GM quality, not oil.

I won’t argue that. They’re plagued with lifter issues.

 

[mrsilv04]

I'm betting I know why this truck was traded in...

 

[drtyler]

I'm betting I know why this truck was traded in...

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Wouldn’t that be reason to keep it?

 

[Hootbro]

Wouldn’t that be reason to keep it?

I could see the owner losing faith in the vehicle in a big repair even though in warranty, give pause to what could happen out of warranty.

 

[350Rocket]

I agree with some of what you said, however a used oil analysis from time to time can be beneficial especially when driving patterns change as in the case of my wife retiring. I ended up shortening the OCI as a result of a recent report. It can also monitor poor air filtration, coolant getting into the oil, fuel dilution, etc. Having said that I'm not a fan of stretching out OCI's as long as possible. In another used oil analysis I discovered a 3 year OCI will work just fine, I might even go a little longer. Time to hide.

5k miles oil changes or less. Wish I'd done the used oil analysis sooner. But my lifters are good so far!

 

[350Rocket]

I ordered a 3 pack 5qt containers of Mobil 1 Extended Performance 0w20. Walmart had it marked for $69.99, and I got 10% cash back.
For the next few changes that’s what she’ll be running. Probably 5-7,000 miles.

My wife's Hyundai Sonata seized up on its first 0w20 OCI. Likely a coincidence also but it seems more plausible than the other way around.

 

[CarlB]

Yes unfortunately

Don't want to delete the AFM?

 

[That John dude]

Don't want to delete the AFM?

I want too, but I didn’t have the extra $1500-2,000 laying around especially since GM was paying this time around.
I plan on buying everything to delete it, but I won’t do the work until it fails.

 

[That John dude]

5k miles oil changes or less. Wish I'd done the used oil analysis sooner. But my lifters are good so far!

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Looks like a good candidate for Valvoline Restore and Protect

 

[350Rocket]

Looks like a good candidate for Valvoline Restore and Protect

It still runs good, but I'm just going to prep a spare 5.3 (I have 2 of them) and replace all the common failures before swapping to future proof the truck for a while.
Common problems that have not yet occurred yet at 261k miles and 11,600 hours on my 4.8 :
Knock sensors
Intake gaskets
Oil pump pick tube O ring
Rear main seal
Exhaust manifold bolts
I'll do all of these plus head gaskets and all other gaskets to the 5.3, plus I get the torque increase.

For now I'm using water plus water wetter (as a lubricant) in my cooling system until winter approaches. Plus I added the gm cooling system crush tablets which seem to have slowed or stopped the coolant leak. Have yet to add coolant since I flushed it and replaced with water. However it was a a slow leak.

Currently doing short intervals to flush the coolant contamination out since I probably won't get the replacement engine ready for a couple of years which puts me at close to 300k miles by that time.