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Oil Consumption

riddler

By riddler
in 6.6L Gas V8 (L8T)

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diyer2
diyer2

Yes Grumpy! I have said forever how oil changes are the lifeblood of an engine. Back in the 70's when I raced quarter mile on the weekends with a daily driver small block Chevy I always changed t

Atlas
Atlas

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 torq

Atlas
Atlas

The level of trolling from someone who joined on Tuesday of last week is pretty high. My guess is former member promoted to visitor who created a new account, or is using a shadow account to bypass us

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diyer2 Senior Enthusiast

diyer2

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Posted

We get rid of one instigator, and another one shows up. 

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asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted
On 5/31/2026 at 7:56 AM, Chuck FB said:

But as to engine oil usage... having to add some oil every so often was a very common theme...

I haven't changed the oil on ANY vehicle in the last 30 years that had a full load of oil in the drain pan when it was changed. Any MAKE, MODEL, ENGINE, USE, TYPE, LOAD, TEMP, CAR, TRUCK, TRACTOR, ETC... never mattered. 

Generally, all are a quart short. I know 'some' will stay in the engine, some in the catch pan, etc. 

Never have ANY of them been close (say with in a cup) of being full.

 

I know this because, I measure every waste oil volume and can compare it to refill volume. A 5 quart engine always has about 4 in the catch pan, every time.

riddler Enthusiast

riddler

Posted
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Posted
23 minutes ago, asilverblazer said:

I haven't changed the oil on ANY vehicle in the last 30 years that had a full load of oil in the drain pan when it was changed. Any MAKE, MODEL, ENGINE, USE, TYPE, LOAD, TEMP, CAR, TRUCK, TRACTOR, ETC... never mattered. 

Generally, all are a quart short. I know 'some' will stay in the engine, some in the catch pan, etc. 

Never have ANY of them been close (say with in a cup) of being full.

 

I know this because, I measure every waste oil volume and can compare it to refill volume. A 5 quart engine always has about 4 in the catch pan, every time.

1 qt per 3k miles?

KARNUT Senior Enthusiast

KARNUT

Posted
Posted

I find all this amusing and perplexing. In measuring oil I use the supplied tool. It’s called a dip stick. Using the supplied tool I have been fortunate enough according to this thread not to have oil usage problems in all but two vehicles. They use one qt every 2500 miles. Different manufacturers both said within normal perimeters. I have access to quite a few vehicles. They have countdown meters for oil changes. I figured using that and pulling the oil checking device I could actually show no oil usage problems. I’ll show them I thought. Then I realized I can’t prove I didn’t add oil. So I decided, screw it. I know what I know. If people want to believe that all vehicles use oil. That’s fine with me. I’m not going to get in the weeds. It’s comes down to what your definition of what is, is. Seems I heard the analogy before.image.png.9c2eb3d90e134cbfffa6d0d2b7b97e4b.png

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riddler Enthusiast

riddler

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1 hour ago, KARNUT said:

I find all this amusing and perplexing. In measuring oil I use the supplied tool. It’s called a dip stick. Using the supplied tool I have been fortunate enough according to this thread not to have oil usage problems in all but two vehicles. They use one qt every 2500 miles. Different manufacturers both said within normal perimeters. I have access to quite a few vehicles. They have countdown meters for oil changes. I figured using that and pulling the oil checking device I could actually show no oil usage problems. I’ll show them I thought. Then I realized I can’t prove I didn’t add oil. So I decided, screw it. I know what I know. If people want to believe that all vehicles use oil. That’s fine with me. I’m not going to get in the weeds. It’s comes down to what your definition of what is, is. Seems I heard the analogy before.image.png.9c2eb3d90e134cbfffa6d0d2b7b97e4b.png

They truly believe they know better. Hopeless 😶‍🌫️

Atlas Senior Enthusiast

Atlas

Posted
Posted (edited)
2 hours ago, KARNUT said:

I find all this amusing and perplexing. In measuring oil I use the supplied tool. It’s called a dip stick. Using the supplied tool I have been fortunate enough according to this thread not to have oil usage problems in all but two vehicles. They use one qt every 2500 miles. Different manufacturers both said within normal perimeters. I have access to quite a few vehicles. They have countdown meters for oil changes. I figured using that and pulling the oil checking device I could actually show no oil usage problems. I’ll show them I thought. Then I realized I can’t prove I didn’t add oil. So I decided, screw it. I know what I know. If people want to believe that all vehicles use oil. That’s fine with me. I’m not going to get in the weeds. It’s comes down to what your definition of what is, is. Seems I heard the analogy before.

 

Ever wonder why so many people run catch cans? Me neither.

 

I wonder if it's because they don't want ...oil and oil vapor... ...from the crankcase... to be routed back into the intake by the PCV system, where it's then burned in the combustion chamber.

 

Weird, right?!

 

I understand we may be getting too "technical" here, but it's worth pointing out those cans aren't just for catching unicorn farts.

Edited by Atlas
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riddler Enthusiast

riddler

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21 minutes ago, Atlas said:

 

Ever wonder why so many people run catch cans? Me neither.

 

I wonder if it's because they don't want ...oil and oil vapor... ...from the crankcase... to be routed back into the intake by the PCV system, where it's then burned in the combustion chamber.

 

Weird, right?!

 

I understand we may be getting too "technical" here, but it's worth pointing out those cans aren't just for catching unicorn farts.

 The main reason I am using the catch can is becaus the 6.6L gasser has side port injection so the valves do not get a washing from above with the gasoline mixture before it enters the combustion chamber, therefore the valves get a constant drench of burnt fuel/ oil mixture causing carbon gook build-up. 

For this reason alone is why I think its a great thing to do for my motor's longevity. However the vapors continue on to  combustion. What does it hurt?

 

KARNUT Senior Enthusiast

KARNUT

Posted
Posted
28 minutes ago, Atlas said:

 

Ever wonder why so many people run catch cans? Me neither.

 

I wonder if it's because they don't want ...oil and oil vapor... ...from the crankcase... to be routed back into the intake by the PCV system, where it's then burned in the combustion chamber.

 

Weird, right?!

 

I understand we may be getting too "technical" here, but it's worth pointing out those cans aren't just for catching unicorn farts.

😆

Atlas Senior Enthusiast

Atlas

Posted
Posted
3 minutes ago, riddler said:

 The main reason I am using the catch can is becaus the 6.6L gasser has side port injection so the valves do not get a washing from above with the gasoline mixture before it enters the combustion chamber, therefore the valves get a constant drench of burnt fuel/ oil mixture causing carbon gook build-up. 

For this reason alone is why I think its a great thing to do for my motor's longevity. However the vapors continue on to  combustion. What does it hurt?

 

 

Hurts nothing, IMO. It's another example of how an engine burns oil. Where do you think the oil vapor comes from?

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riddler Enthusiast

riddler

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1 minute ago, Atlas said:

 

Hurts nothing, IMO. It's another example of how an engine burns oil. Where do you think the oil vapor comes from?

So are you cnvinced the catch can does good for the 6.6L?

Atlas Senior Enthusiast

Atlas

Posted
Posted
Just now, riddler said:

So are you cnvinced the catch can does good for the 6.6L?

 

Does it prevent the 6.6 from burning oil that would otherwise be sucked into the intake?

riddler Enthusiast

riddler

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Just now, Atlas said:

 

Does it prevent the 6.6 from burning oil that would otherwise be sucked into the intake?

It does prevent carbon sludge build up.

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