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GM oil quantity from 8.5 to 8 qts?


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I read on another forum that GM amended the owner's manual recommended oil from 8.5 to 8 qts. I find this out after I do my first oil change to Mobil 1 and the level is def at the top of the cross hatches on the dip stick, maybe a hair higher.

 

Anyone else notice this? How in the world does a manufacturer not get the oil quantity correct in the first place on their own engine?

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I read on another forum that GM amended the owner's manual recommended oil from 8.5 to 8 qts. I find this out after I do my first oil change to Mobil 1 and the level is def at the top of the cross hatches on the dip stick, maybe a hair higher.

 

Anyone else notice this? How in the world does a manufacturer not get the oil quantity correct in the first place on their own engine?

 

:chill: It's no biggie. 1/2 quart was probably something discovered that produced a little more windage, thereby putting more oil in our PCV system, fouling our intake valves, causing detonation, leading to poor fuel consumption, damaged engines, spiked emissions, increased global warming, and the end of life on Earth as we know it.

1813aqov5wc2jjpg_zpsi9tn29ii.jpg

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:chill: It's no biggie. 1/2 quart was probably something discovered that produced a little more windage, thereby putting more oil in our PCV system, fouling our intake valves, causing detonation, leading to poor fuel consumption, damaged engines, spiked emissions, increased global warming, and the end of life on Earth as we know it.

1813aqov5wc2jjpg_zpsi9tn29ii.jpg

Hilarious !!!!!

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:chill: It's no biggie. 1/2 quart was probably something discovered that produced a little more windage, thereby putting more oil in our PCV system, fouling our intake valves, causing detonation, leading to poor fuel consumption, damaged engines, spiked emissions, increased global warming, and the end of life on Earth as we know it.

1813aqov5wc2jjpg_zpsi9tn29ii.jpg

No problem for the RX catch can clan.

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I was wondering the same thing, 8.5 quarts put it slightly above the full mark. Does anyone know the answer to OP's question. Thanks

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I read a couple weeks ago that the oil quantity change was cosmetic. They got the dipstick length a bit "off." When filled with the proper 8.5 qts., people were calling the dealer and asking why their oil level reading was too high. Rather than changing anything physical, they just changed the recommended quantity from 8.5 to 8.0. Problem solved. They also said that the engine holds so much extra oil that either quantity is fine -even if you care to stay with the 8.5.

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Actually, the top of the cross-hatched area is over full now. The top dimple in the cross-hatched area is the new FULL MARK.

 

I read a bulletin back 5 or 6 months ago about this. Should have saved a copy and added to my Owners Manual, I guess?

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I read a couple weeks ago that the oil quantity change was cosmetic. They got the dipstick length a bit "off." When filled with the proper 8.5 qts., people were calling the dealer and asking why their oil level reading was too high. Rather than changing anything physical, they just changed the recommended quantity from 8.5 to 8.0. Problem solved. They also said that the engine holds so much extra oil that either quantity is fine -even if you care to stay with the 8.5.

 

 

I also wonder if some service mechanics were putting the full 9 quarts that show up on the service order in, instead of just backing off on that last 1/2 quart? I know mine has read higher than the cross-hatches after sitting for a week without running. All of the oil in the pan. Checking it a few minutes after shutting it down after a cold start, letting the oil get to the top of the engine, the reading is obviously a little lower. Never really checked it after running long enough to get the engine up to top temp.

 

I do know that it is hard to get a good reading on the stick, no matter what you do. Not a fan of that flimsy curly-q dip-stick.

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