randomly losing oil 6.2

drivereye · March 2, 2022

Spoiler

50k is when i noticed my oil light. Every other Saturday for about 3 months the service dept. would wait 15 minutes and document then top up the oil. Then a month in the shop to change out the block for a scored cylinder wall. They are looking for a consistent consumption of over 1 litre for every 3200km (which is a joke think over 3 litre per oil change is acceptable).

Pinnacle · March 2, 2022

Normal GM operation, I always drove with a liter of oil in the back lol. Just GM junk always been that way.

fljar · March 3, 2022

15 hours ago, Pinnacle said:

Normal GM operation, I always drove with a liter of oil in the back lol. Just GM junk always been that way.

Well..I hope that's not the case. I had a '15 Yukon with the 6.2L. Sold it at 150,000 miles; never had a low oil issue (but had other issues - gotta love AFM and those lifters)

BIGDOGx · March 3, 2022

18 hours ago, Pinnacle said:

Normal GM operation, I always drove with a liter of oil in the back lol. Just GM junk always been that way.

These motors do consume oil for sure, but not the amount the OP is describing. That is an excessive amount imo, i have almost 8 years and over 50k on my 6.2 and i might need to add a half quart after 6+ months of use. As you can see i don't put a ton of miles on it but not all 6.2's consume oil at this rate.

I agree though that no doubt GM will come back with the it's within range excuse.

Pinnacle · March 5, 2022

On 3/3/2022 at 9:13 AM, fljar said:

Well..I hope that's not the case. I had a '15 Yukon with the 6.2L. Sold it at 150,000 miles; never had a low oil issue (but had other issues - gotta love AFM and those lifters)

"never had a low oil issue" but you did add oil all GM LS engines burn oil more then any other engine from any maker.

Jrodpic · March 5, 2022

Interesting to hear about GM engines burning oil. Not a Silverado, but I am the original owner of a 2010 Camaro SS with the 6.2 L99. Only 48K miles, but has never burned oil. You sure it’s not seeping??

Anthonyj · April 24, 2022

I have a 2020 Chevy Silverado with 10,000 miles on it it has the 6.2 L in it and I noticed it is using a lot of oil it’s not burning it I don’t understand. I’ve had three oil changes in that 10,000 mile time. How can this truck be using so much oil it’s not leaking

drivereye · April 25, 2022

What makes you think it’s not burning?

if it’s not leaking…?

CamGTP · April 25, 2022

It's boiling the oil, duh.

MachWun · December 28, 2022

I have a 2020 Denali 2500HD. I had the low oil light come on at least once before. Around 12,000 miles and again around 17,000. But I explained it away because I was towing my RV about 1800 miles on the one occasion. Well, I have 23,000 now, about 2400 since my last oil change. Full synthetic. And it took 3 quarts to get it squarely in the cross hatch on the dip stick.

No oil on the ground. This is an expensive truck so dumping it is a lousy choice after 2 years.

Edited December 30, 2022 by MachWun
Correct mis-spelling and error with mentioned mileage

GMCustomerService · December 30, 2022

On 12/27/2022 at 8:10 PM, MachWun said:

I have a 2020 Denali 2500HD. I had the low oil light come on at least once before. Around 12,000 miles. But I explained it away because I was dmtowing my RV about 1800 miles. Well, I have 17,000 now, about 2400 since my last oil change. Full synthetic. And it took 3 quarts to get it squarely in the cross hatch on the dip stick.

No oil on the ground. This is an expensive truck so dumping it is a lousy choice after 2 years.

This is certainly not what we like to hear, MachWun. Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2020 GMC Denali 2500HD. To do so, please send an email to [email protected] with ATTN: MachWun/GM Trucks in the subject line.

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MachWun · February 6, 2023

So, contacted GM. That bore no fruit. The assistance is to contact the dealer to express my concern (I can do that) and schedule an appointment (I can do that to).

What I found is a service bulletin that say to change the oil to start an oil consumption test and then routinely complete a log they attached to the bulletin. Dealer did not change the oil and told me to come back in 2000 miles for them to check the oil.

Hmm, the quantity of oil in the engine is unknown since I added three based on the dip stick (not very scientific). I would be well past my oil change interval (not good) and, they did not check my service detalis. If they had, they would have noticed they only puy 6 quarts in at the last oil change.

Unless something drastic changes, it is looking like I will be selling this truck. And if I do, will be my last GMC. Loyalty out the window. Been a lifelong GM customer, buying a new one sometimes in 2 years.

drivereye · February 6, 2023

I took my truck in every Saturday and they documented any top ups they did. This went on for over a couple months. If your consumption is under the max allowable amount they will tell you your truck is not covered under warranty.

Oscar Winner · February 7, 2023

I've owned several newer Jeeps and a Subaru Forester that both used oil. The Subaru would constantly kick on the low oil light about 2/3 way through its typical oil change period. I think it's a common biproduct of newer engines unfortunately.

diyer2 · February 7, 2023

Well you're not going to like this but,

If the check oil light coming on is stored in memory and can be read or you admitted it came on I would void your warranty.

I get it's a safety device to prevent ruining an engine, but come on how hard is it to check the oil level regularly.

No excuse in my book.

I was an operating engineer for 7 years and the owner would fire you if they found a piece of equipment you had used was low on oil. Yes, this was before low oil lights.