Oil Consumption

Another JR · May 29

12 hours ago, Chuck FB said:

Do you notice a change in consumption speed over your oil change interval or does it seem fairly steady in its slow drop over the miles ?

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.

Grumpy Bear · May 29

8 hours ago, Chuck FB said:

On that topic of atmospheric conditions experienced by the engine during its operation, it would be interesting to see inside of a certain engine platform type to compare the death valley low humidity hot weather theme of the summer vs a hot but very humid climate such as along the gulf states during the summer. Granted the outcome would change drastically if they were run short intervals vs longer heat cycles that would heat up the oil to drive out the moisture that is present.

Conversely very cold weather means not only the struggle to reach a proper oil temperature, that smaller town person that mostly never drives out of town doesn't allow the oil to reach a proper temp and does the typical to work, back home for lunch, back to work, then finally back home theme day after day. I can only imagine the wear and sludge build up in a "typical" maintenance schedule theme engine. Thee old cardboard over the grill or in front of the rad theme all winter was no doubt helping more then they realized to help the life of the engine and not just to build heat quicker for the cab heat and defrost.

Raven (2024 Mitsubishi Mirage G4) which I bought new I've now lived with for two winters and a summer and I've run UOA's on every oil change (3,750 mile OEM Severe Schedule) after initial break in. It now has 46K miles on it so quite a few data points all from the same Oil Analyzers (AMZOIL) Lab. Thank you Nick. So I'm telling you what I think. I'm telling you what the labs say.

Weather matters and it matters a good deal. Labs tell me that even 3,750 miles is to long during the winter months and that during the summer the oil has a bit of life left in it on that schedule. It tells me running a grill block DOES impact oil life. The difference is about 35%. I listen to the physics and I adjust the OCI by season.

So now someone needs to call the lab and tell them their idiots too.

Atlas · May 29

Driving habits definitely affect oil consumption. Grumpy knows.

Towing with light trucks, heavy trucks, when you're running full boost more often or spinning gas engines at their peak torque for prolonged periods, they consume more oil. Period. Y'all flat-landers need to come out here in the Mountain West and tow for a while.

riddler · May 29

Hows that GM koolaid taste? If you believe the oil consumption issue with the L8T 6.6 is caused by driving habits, well I cant help you.

KARNUT · May 29

14 minutes ago, Atlas said:

Driving habits definitely affect oil consumption. Grumpy knows.

Towing with light trucks, heavy trucks, when you're running full boost more often or spinning gas engines at their peak torque for prolonged periods, they consume more oil. Period. Y'all flat-landers need to come out here in the Mountain West and tow for a while.

I put 1 million miles towing 24klbs combination. Changing trucks every 100K miles turning them into crew trucks on pipelines. Where they idle all day. That continues today. No oil usage. Maybe it’s the Amsoil. Maybe if you come to paradise I’ll show you our fleet. It would blow your mind.

Atlas · May 29

13 minutes ago, riddler said:

Hows that GM koolaid taste? If you believe the oil consumption issue with the L8T 6.6 is caused by driving habits, well I cant help you.

Try to keep up.

Oil consumption is affected by driving habits. That's generally true. I'm not sure anyone has said that is the cause of your L8T's oil consumption, but as a general rule, the harder you work an engine, the more engine it's likely to consume.

A quart every 3k does seem like a lot, but, by GM's documentation it's somewhere within their self-determined limits of consumption. The limits are set mostly so they don't have to do anything about it except for extreme cases.

If GM won't help you and you're uncomfortable with your L8T consuming a quart every 3k, get rid of the truck? Seems like the only option you have left?

Atlas · May 29

2 minutes ago, KARNUT said:

I put 1 million miles towing 24klbs combination. Changing trucks every 100K miles turning them into crew trucks on pipelines. Where they idle all day. That continues today. No oil usage. Maybe it’s the Amsoil. Maybe if you come to paradise I’ll show you our fleet. It would blow your mind.

Eating cheeseburgers idling a truck isn't exactly creating the cylinder pressures or temperatures that cause oil consumption.

24k, wow, were you pulling your purse?

KARNUT · May 29

1 minute ago, Atlas said:

Eating cheeseburgers idling a truck isn't exactly creating the cylinder pressures or temperatures that cause oil consumption.

24k, wow, were you pulling your purse?

You don’t know what 24k is?

Atlas · May 29

Just now, KARNUT said:

You don’t know what 24k is?

kNut, that's not heavy. Crossing a scale at 105,500 on the nose is heavy, and legal, here. Pulling off a jobsite at 160k is heavy. Heavy haul is heavy. Pulling that stuff up an 8% grade is heavy.

You and your purse crossing a scale at 24k isn't heavy.

KARNUT · May 29

1 minute ago, Atlas said:

kNut, that's not heavy. Crossing a scale at 105,500 on the nose is heavy, and legal, here. Pulling off a jobsite at 160k is heavy. Heavy haul is heavy. Pulling that stuff up an 8% grade is heavy.

You and your purse crossing a scale at 24k isn't heavy.

This proves you know nothing. We’re not talking about semi's. I’ve driven them too. Draglines, earthmovers, bulldozers there’s very little I’ve haven’t operated, hauled or worked on. 24klbs is heavy hauling with 3/4-1 ton trucks. And yes through the mountains. I’m not a paper tiger, Ive walked the walk.

riddler · May 29

26 minutes ago, Atlas said:

Try to keep up.

Oil consumption is affected by driving habits. That's generally true. I'm not sure anyone has said that is the cause of your L8T's oil consumption, but as a general rule, the harder you work an engine, the more engine it's likely to consume.

A quart every 3k does seem like a lot, but, by GM's documentation it's somewhere within their self-determined limits of consumption. The limits are set mostly so they don't have to do anything about it except for extreme cases.

If GM won't help you and you're uncomfortable with your L8T consuming a quart every 3k, get rid of the truck? Seems like the only option you have left?

Not asking your worthless opinions here move on

Atlas · May 29

5 minutes ago, KARNUT said:

This proves you know nothing. We’re not talking about semi's. I’ve driven them too. Draglines, earthmovers, bulldozers there’s very little I’ve haven’t operated, hauled or worked on. 24klbs is heavy hauling with 3/4-1 ton trucks. And yes through the mountains. I’m not a paper tiger, Ive walked the walk.

If you knew anything you'd know heavy towing increases oil consumption, pickup, semi, whatever you're driving. 24k still isn't heavy for a lot of 1-tons. Go ahead, call GM and tell their engineers how wrong they are because you once towed 24k.

riddler · May 29

1 hour ago, Atlas said:

Try to keep up.

Oil consumption is affected by driving habits. That's generally true. I'm not sure anyone has said that is the cause of your L8T's oil consumption, but as a general rule, the harder you work an engine, the more engine it's likely to consume.

A quart every 3k does seem like a lot, but, by GM's documentation it's somewhere within their self-determined limits of consumption. The limits are set mostly so they don't have to do anything about it except for extreme cases.

If GM won't help you and you're uncomfortable with your L8T consuming a quart every 3k, get rid of the truck? Seems like the only option you have left?

Hey bud you sont have any say what options I have. Cant fix stupid.

Atlas · May 29

8 minutes ago, riddler said:

Hey bud you sont have any say what options I have. Cant fix stupid.

Intellectual elitism really needs to make a comeback. You've got retired chemical engineers oil from the oil industry here, an active GM tech who works on these things all day long, and other people telling you you're wrong. You came here asking for opinions.

But sure, trust your feelings on this one and keep pumping whatever Ford you owned in the past, that's helping establish your credibility on the issue.

Edited May 29 by Atlas

KARNUT · May 29

10 minutes ago, Atlas said:

Intellectual elitism really needs to make a comeback. You've got retired chemical engineers oil from the oil industry here, an active GM tech who works on these things all day long, and other people telling you you're wrong. You came here asking for opinions.

But sure, trust your feelings on this one and keep pumping whatever Ford you owned in the past, that's helping establish your credibility on the issue.

You really don’t have a clue. You just think you know. I have access to many vehicles in the field. New stuff. Diesel, gas all brands. If they use oil I would say it. No reason to say otherwise. No speculation real experience. I’m not brand loyal. I use what gives me service. It no simpler than that. If you’re using oil you’re doing something wrong or something went wrong in assembly. I just picked up a new super duty diesel last week. Five hundred fifty Horsepower. The sensation of speed was amazing. It was a fun ride on the back roads home. Of course you could say I’m making it up. I don’t care.