Oil Capacity Question/Verification

[viven44]

Just a small thing to pay attention to while changing oil and/or checking oil level. Viscous lukewarm oil tends to cling onto surfaces and not drain well.

- A fully hot engine will drain about a 1/4th of a quart more than an engine that hasn’t been warmed up fully
- The corollary to this that a cold engine that was turned off when fully hot will also drain almost the same amount as a fully hot engine, as most of it is in the pan already (although won’t drain as fast from the pan as hot oil)

If the oil change was performed after a 5 min drive, you’ll need about 1/4th of a quart less as it didn’t drain fully

 

[Vladimir2306]

Just a small thing to pay attention to while changing oil and/or checking oil level. Viscous lukewarm oil tends to cling onto surfaces and not drain well.

- A fully hot engine will drain about a 1/4th of a quart more than an engine that hasn’t been warmed up fully
- The corollary to this that a cold engine that was turned off when fully hot will also drain almost the same amount as a fully hot engine, as most of it is in the pan already (although won’t drain as fast)

If the oil change was performed after a 5 min drive, you’ll need about 1/4th of a quart less as it didn’t drain fully

No, the oil drains completely 0-20 in 5 minutes. I checked the oil level immediately after a long trip on the highway, in 5 minutes it drains completely into the sump, and then after 10, then 15 and even 20 minutes, its level no longer changes.
But if you change the oil on a cold engine, for example, at home. After a night of parking, then yes, most likely the oil will drain less than when warmed up. Since I have oil in the service, and always go to it, they change the oil for me warmed up, and the engine includes 8.2-8.3 liters of oil, which is almost 9 quarts.

 

[viven44]

Yes when fully hot it drains quickly and fully. Even 10W-40.

When semi warm, it won’t drain into the sump quickly and actually never fully no matter how long you let it sit… some of that viscous oil is held in by surface tension between so many surfaces.

 

[viven44]

With 0W40 in my 6.2l at 1500-3000 RPM my engine pretty much has 45 PSI of oil pressure.

I see this as an issue for sure on the 6.2L. Yes check your neighbors running the 0W-20 and let us know if the PSIs are any different.

 

[Scarey]

You always want to change the oil hot. More contaminants in solution. Cold, the contaminants have had time to collect at the bottom of the pan as a kind of sludge and not drain as easily. I just did my first oil change after the free one. I cut the filter open and was very surprised at how light duty the filter is. I’ve cut open allot of filters in other applications and this is by far the lightest filter I’ve seen. This all speaks to doing a hot oil change so you get more contaminants out.

 

[PPV_2018]

Out of 100 members here that change their own oil, 2/100 say the capacity is 9 quarts. The other 98 and GM say 8 quarts.

Shopping for new (to me) work trucks a few weeks ago and stumbled across something — something I DID find quite interesting

The underhood picture of on of the silverados i was looking at had “9qt ow20” scribbled in huge block letters on the plastic “beauty” cover…

Needless to say, i will not be purchasing that truck.

 

[Silverado4x4]

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!

OK if you say so, I guess everything went to $hit after you left. Iam out.

 

[GMCnewbee]

Wow, we seem really fixated on this 8 or 9 quart issue. The dipsticks have a range, meaning you are OK within the range. No need to get so precise. 8 is OK, I have checked it myself after a Dealer oil change, and 9 quarts are OK, just puts you at the top of the "range". Chill everybody.

Don't blame everything on the engineers. The designs come into being in Production. Things can be changed that an engineer does not control.

 

[Blackcar]

Wow, we seem really fixated on this 8 or 9 quart issue. The dipsticks have a range, meaning you are OK within the range. No need to get so precise. 8 is OK, I have checked it myself after a Dealer oil change, and 9 quarts are OK, just puts you at the top of the "range". Chill everybody.

Don't blame everything on the engineers. The designs come into being in Production. Things can be changed that an engineer does not control.

Does dealer put 9 quarts on work order when you have them change?

I change my own and add 8 start then let set and add more until 3/4 on dip stick probably 1/2 quart or more.

 

[GMCnewbee]

Does dealer put 9 quarts on work order when you have them change?

I change my own and add 8 start then let set and add more until 3/4 on dip stick probably 1/2 quart or more.

Yes, Dealer charged me for 8 quarts. We are not yet in a relationship where they will give me a free quart of oil. Still hoping.