Oil Capacity Question/Verification

[Scarey]

I think GM tried to squeeze to much in the way of fuel economy out of the 6.2l and chose the 2 stage oil pump in order reduce pumping loss in the oil pump except when absolutely necessary. But interesting that GM engineers deemed the 6.2l to need 80 PSI of oil pressure under higher RPM operation, but were satisfied with 40-45 PSI when the engine is under severe loading at lower RPM, lugging!

With all the stupid Auto Stop/Start garbage (soon to hopefully be a thing of the past) I would have expected the manufacturers to put an oil accumulator with an electrical trigger or an electric oil pump like they use in the automatic transmissions to keep the oil pressure in the bearings during all these dry starts. For all that do not disable the Auto Stop/Start feature, I wonder how much they are aging their engine during all these repeated engine starts.

An old rule of thumb was 90% of engine wear occurs during start. Auto start/stop is the dumbest thing ever.

 

[Z15]

5.3L and 6.2L takes 8 qts. Anyone thinking it takes more is wrong! Stop overfilling!
These modern engines can take a long time (deliberate) for all oil to drain back to the pan, hours in some cases. The Anti-Drain Back Valve in the oil filter also keeps oil up in the lifer galleys to prevent dry starts. If you do your own oil changes you will notice this because once you loosen the filter, oil comes gushing out.

Here are the official capacity charts

https://gm-techlink.com/wp-content/uploads/2024/11/TechLink-engine-oil-capacities-2024_B.pdf

 

[jfoj]

@Z15

Sorry this is clearly not the case these engines take nine quarts. That's what factory fill is and that's what we've matched and many members and people outside the forum have seen the same thing.

But do what you want and follow a piece of paper.

 

[Z15]

I have owned 4 6.2L engines (12,15,17 & 21) and NEVER has 8 qts not shown it as full.

 

[jfoj]

Look ay my dipstick picture above. These dipsticks suck and make the true level hard to determine

Your 2012 spec was probably 8.5 qts until GM put out a bulletin that changed the spec to 8.0 qts. Then GM did an about face and went back to 8.5 quarts. They cannot seem to make their mind up. See link below, page 3, 2nd question. Then they went back to 8.0 quarts.

But you do what you feel is right!

Older GM Oil Info Bulletin

GM 8.0 Quart Service Bulletin

 

[Silverado4x4]

@Z15

Sorry this is clearly not the case these engines take nine quarts. That's what factory fill is and that's what we've matched and many members and people outside the forum have seen the same thing.

But do what you want and follow a piece of paper.

So your saying GM is wrong? OK so go ahead a put 9qts in and let the crank hit the oil and aerated (froth) the oil and circulate air bubbles through the motor. GM specifies 8qts and that what it gets.

 

[Scarey]

So your saying GM is wrong? OK so go ahead a put 9qts in and let the crank hit the oil and aerated (froth) the oil and circulate air bubbles through the motor. GM specifies 8qts and that what it gets.

I don’t think overfilling is that critical, within reason. But I think under filling is far more serious.

 

[jfoj]

So your saying GM is wrong? OK so go ahead a put 9qts in and let the crank hit the oil and aerated (froth) the oil and circulate air bubbles through the motor. GM specifies 8qts and that what it gets.

I have heard this same crap from many who commented on this thread.

Do you REALIZE that I matched the oil level found in the engine when the vehicle was delivered?

Do you REALIZE I have checked multiple other new vehicles and found the exact same situation?

Do you REALIZE this the level is about 1/8" above the top full mark on the dipstick?

Do you really think that 1/8" above the fill mark the crank will be hitting the oil in the crankcase?

Do you understand this level is well below the windage tray mounted to the bottom of the engine?

 

[Silverado4x4]

I do REALIZE you think you know a whole lot more then GM engineering and seam to know everything based on your posts.

 

[jfoj]

I do, used to work for GM, know a bit about how they operate. I am also not just some DIYer, I made my living in the automotive industry for many years.

If GM engineers were so smart we would not have 600,000 6.2l engines in questions and valve bodies still failing for the same reasons as they have for the past 10 years!