Oil Consumption

[Grumpy Bear]

3 hours ago, KARNUT said:

I’ve had two vehicles use oil from new.

Yep, it happens, but...

The test subject under discussion used none for 20K miles THEN started using.

You tell me, what changed? 

 

 

 

2 minutes ago, Atlas said:

 

That's some wild projection! The mental gymnastics in your posts are making me laugh. Do you need a hug?

 

He needs a...

 

 

 

There isn't an intelligent discussion to have once we throw away facts, truth, reason, rules and reality. He didn't want an answer. He want's to be entertained. Disengage Number One. 

 

[riddler]

7 minutes ago, Grumpy Bear said:

Yep, it happens, but...

The test subject under discussion used none for 20K miles THEN started using.

You tell me, what changed? 

 

 

 

 

He needs a...

 

 

 

There isn't an intelligent discussion to have once we throw away facts, truth, reason, rules and reality. He didn't want an answer. He want's to be entertained. Disengage Number One. 

 

GM is the culprit. Drive style matters not. Hopefully the new 6.7 is back to normal : little to no oil consumption.

 

[KARNUT]

3 minutes ago, Grumpy Bear said:

Yep, it happens, but...

The test subject under discussion used none for 20K miles THEN started using.

You tell me, what changed? 

 

 

 

 

He needs a...

 

 

 

There isn't an intelligent discussion to have once we throw away facts, truth, reason, rules and reality. He didn't want an answer. He want's to be entertained. Disengage Number One. 

 

I’ve never experienced that phenomenon. I’ve put super chargers on several GM engines the added pressure didn’t make them use oil. Most of my trucks (all brands) were tuned. Raising the max RPMs and shift points. No oil usage. I would change gears for more cruising RPMs. I beat them hard. They idled all day so my crew guys could cool off. No oil usage. My company paid for my trucks and gas. One of the perks of a family business. I worked hard I earned it. As I always say I can only give my and company’s experience. By the way it wasn’t just me. It was many. 

[riddler]

5 minutes ago, KARNUT said:

I’ve never experienced that phenomenon. I’ve put super chargers on several GM engines the added pressure didn’t make them use oil. Most of my trucks (all brands) were tuned. Raising the max RPMs and shift points. No oil usage. I would change gears for more cruising RPMs. I beat them hard. They idled all day so my crew guys could cool off. No oil usage. My company paid for my trucks and gas. One of the perks of a family business. I worked hard I earned it. As I always say I can only give my and company’s experience. By the way it wasn’t just me. It was many. 

Oh but were engineers we know better. What a joke. 

Like you my experience with all my vehicles is that drive style ays no part in the oil consumption.

[KARNUT]

10 minutes ago, riddler said:

Oh but were engineers we know better. What a joke. 

Like you my experience with all my vehicles is that drive style ays no part in the oil consumption.

I don’t doubt their experience as such. I never treated my equipment as delicate flowers. They all were used as tools. They had to perform. They were also entertainment. We sometimes would race on pipeline roads. My dad too. You don’t have to do much to them now days. They haul ass. I still haven’t experienced an oil user. That doesn’t mean it doesn’t happen. If it did we would do a tear down to find out why. Well our shop guys would. It’s been awhile for me.

[riddler]

52 minutes ago, Grumpy Bear said:

Yep, it happens, but...

The test subject under discussion used none for 20K miles THEN started using.

You tell me, what changed? 

 

 

 

 

He needs a...

 

 

 

There isn't an intelligent discussion to have once we throw away facts, truth, reason, rules and reality. He didn't want an answer. He want's to be entertained. Disengage Number One. 

 

Run!

[Chuck FB]

8 hours ago, Another JR said:

Because it has never used much oil, I haven’t monitored it closely enough to know for sure. However, the measured drop on my latest longer interval after our road trip of 4500 miles (nearly 0.6 quarts) was roughly proportional to the drop in previous 3750 miles intervals (a little less than 0.5 quarts), which would imply the drop is steady. 

 

The reason I asked that has to do with what I have observed over the years in various gas or diesel engines where upon the initial oil change the level depending on the engine seems to remain very good with little in the way of usage and not having added any oil so far but at some point that changes and can change fairly drastic on some engines where now the level has dropped a long ways down although still within the safe range and its time to add oil. Add the oil so its now back to full like it was at the beginning with the new oil but the time in operating hours now before having to add again is cut quite a bit shorter. I've chalked it up to the oil additives are being used up and perhaps some oil sheer as well. Some of these examples are farm tractors or combines etc that see a fairly similar load all the time and each year and each oil change shows up a very similar tracking, as the oil gets the hours on it, it starts to use more oil by a fair margin. I suppose it really doesn't come as a surprise that engines prefer new clean oil vs that same oil on the other end of the oil change interval. 

[Atlas]

My LZ0 is burning a little bit during break-in, but they come with an extra quart in the sump for exactly this reason.

 

Had a weird one...a 2.8 diesel in a Colorado. Didn't burn anything of concern until I towed a car on a trailer across the country. Was battling headwinds and mountain passes all day and it consumed almost an entire quart. I just about fell over. Refilled it, burned a little on the leg home, and then the next OCI, back to almost nothing.

 

The L9 in our motorhome burned oil on break-in but has stopped. It's got 35k now, some people say that's not broken in on a Cummins, but I think the rings are fully seated. It spends a lot of time pulling a vehicle on a trailer on mountain passes with the throttle buried. Good little engine it is, even though it's slowww.

 

Had an LLY Duramax in the previous rig but it was used, and it did consume some even with 50k on it.

 

I keep my rigs filled to the "full" mark on the dipstick. When they drop below that, i consider that refill territory.

[Grumpy Bear]

9 hours ago, KARNUT said:

I’ve never experienced that phenomenon. 

 

Then you haven't any relevant input for those that have had that experience, right? 

[Grumpy Bear]

7 hours ago, Atlas said:

My LZ0 is burning a little bit during break-in, but they come with an extra quart in the sump for exactly this reason.

 

Had a weird one...a 2.8 diesel in a Colorado. Didn't burn anything of concern until I towed a car on a trailer across the country. Was battling headwinds and mountain passes all day and it consumed almost an entire quart. I just about fell over. Refilled it, burned a little on the leg home, and then the next OCI, back to almost nothing.

 

The L9 in our motorhome burned oil on break-in but has stopped. It's got 35k now, some people say that's not broken in on a Cummins, but I think the rings are fully seated. It spends a lot of time pulling a vehicle on a trailer on mountain passes with the throttle buried. Good little engine it is, even though it's slowww.

 

Had an LLY Duramax in the previous rig but it was used, and it did consume some even with 50k on it.

 

I keep my rigs filled to the "full" mark on the dipstick. When they drop below that, i consider that refill territory.

 

Sounds like relevant experience. Also in line with the OEM Engineers of both GM and Ford. Ford makes note in their oil consumption test that they will use oil for the first 10 K and not to do a consumption test before that point. 

 

https://static.nhtsa.gov/odi/tsbs/2019/MC-10169811-0001.pdf

 

GM defines things like aggressive and towing. Break in, excessive idle, ect. 

 

https://dot.report/bulletins/11007091

[Grumpy Bear]

On 5/27/2026 at 2:05 PM, riddler said:

Thanks for the info. No leaks using about a qt every 3k. I have 31k on it been burning oil since 20k. I will put Valvoline in it my next oil change.

 

Oil consumption free for 20K miles then BOOM, it starts?

And YOUR driving habits, environment, fluid maintenance had nothing to do with that? 

 

 

Some GM Engineer come into your yard at 20K and sabotage it?

 

 

 

But your going to use Valvoline to free/clean the rings?

 

Those are YOUR words I quoted.

 

GM gave you an oil tight motor. Your inputs fouled them. If you believe those rings can be freed/cleaned by use of Valvoline's Restore and Protect then their fouling could have been PREVENTED GENIUS! 

 

If you don't believe it will work and your going to try it anyway.....WHY? 

 

 

Edited May 30 by Grumpy Bear

[KARNUT]

4 hours ago, Grumpy Bear said:

 

Then you haven't any relevant input for those that have had that experience, right? 

So you rather people think everyone has an oil burning problem? There’s not many people who have had more experience with multiple vehicles than I have. Through my hobbies and my business. If you have a vehicle that uses oil that’s not normal. Most people don’t have an oil burning problem even going by the manufacturer’s recommendations. Your service intervals aren’t normal. You’re what is called an outlier. Most people don’t have time or the inclination to do as you do. I’m not saying to you that you have no input. You seem to have an issue with a person who has a different experience than you. My experiences are real. Maybe it all comes down to using Amsoil. Even during my extended days. If you don’t like it block me once again. I don’t need your approval.

Edited May 30 by KARNUT

[KARNUT]

GM is having a problem with the 6.2. It started around 2020. It’s been reported even in the 2026 models. Driving style has little to do with the failure. The mileage varies. The service duty varies. The failure event varies. So is it possible it’s happening with this engine with little driver input? Duh!

[riddler]

5 hours ago, Grumpy Bear said:

 

Oil consumption free for 20K miles then BOOM, it starts?

And YOUR driving habits, environment, fluid maintenance had nothing to do with that? 

 

 

Some GM Engineer come into your yard at 20K and sabotage it?

 

 

 

But your going to use Valvoline to free/clean the rings?

 

Those are YOUR words I quoted.

 

GM gave you an oil tight motor. Your inputs fouled them. If you believe those rings can be freed/cleaned by use of Valvoline's Restore and Protect then their fouling could have been PREVENTED GENIUS! 

 

If you don't believe it will work and your going to try it anyway.....WHY? 

 

 

Stupid is as stupid does. Go away your irrelevent just like driving habits to oil consumption.

[riddler]

2 hours ago, KARNUT said:

So you rather people think everyone has an oil burning problem? There’s not many people who have had more experience with multiple vehicles than I have. Through my hobbies and my business. If you have a vehicle that uses oil that’s not normal. Most people don’t have an oil burning problem even going by the manufacturer’s recommendations. Your service intervals aren’t normal. You’re what is called an outlier. Most people don’t have time or the inclination to do as you do. I’m not saying to you that you have no input. You seem to have an issue with a person who has a different experience than you. My experiences are real. Maybe it all comes down to using Amsoil. Even during my extended days. If you don’t like it block me once again. I don’t need your approval.

Humpy Bear, aka GM fanboy. Block us both please. Your irrelevant. @Grumpy Bear