Making Oil

[TomG2]

I see on another forum where owners report of showing more oil on their dipstick at the end of a long hard drive than at the beginning. Mostly with turbocharged engines. Anything to this or explanation?

[JRscooby]

JIMNLIN wrote:

Dufus wrote:
I had a transmission modulator valves go south and fill the crankcase with transmission fluid.

That brought back long gone memories.
BTDT....along with ruined spark plugs.
Very typical of our older gen auto trannies as just about all of them had the valve.
Tell tale was a puff of blue smoke on start up which many just ignored for various reasons, till fluids came out the engine oil dip stick tube.

Most times you would burn or smoke the trans fluid. Or the cooler leak fluid into the radiator. For years gas in the oil would be the first indication the fuel pump was going out.

Story I heard after Dad passed; He was fed up with the neighbors bragging about their great gas mileage. He bought Mom a Chevitte. Then once a month he would stick a hose in the tank, MT 5 gal can into is van. Took about 3 months before one asked him why. "If I don't drain some out once in awhile it will run over!"

[JIMNLIN]

Dufus wrote:
I had a transmission modulator valves go south and fill the crankcase with transmission fluid.

That brought back long gone memories.
BTDT....along with ruined spark plugs.
Very typical of our older gen auto trannies as just about all of them had the valve.
Tell tale was a puff of blue smoke on start up which many just ignored for various reasons, till fluids came out the engine oil dip stick tube.

[deltabravo]

MARKW8 wrote:
I had an 08 Duramax with 140k on it when I traded it. I always joked about it making oil.

My 2009 has just under 70k miles and I've never added oil to mine either.

[deltabravo]

miltvill wrote:
I had the same issue with my 2008 Chevy 2500 Duramax. This was a well documented issue at the time. During regen fuel is injected into the piston during the exhaust cycle which which pushes unburned fuel through the exhaust system into the DPF where it burns the diesel particles. Some fuel would find its way back into the oil.

This was the LMM Duramax - 2007.5-2010 model years

miltvill wrote:
The problem was corrected in later years by injecting fuel into the manifold during Regen.

This was the LML Duramax, 2010-2016. It has the DEF system.

[CharlesinGA]

Mercedes does not like Bio diesel because it contaminates the oil and causes cylinder wash down. They specifically tell you to keep a close eye on the oil level if you constantly run Bio and if it rises, change the oil.

Charles

[MARKW8]

I had an 08 Duramax with 140k on it when I traded it. I always joked about it making oil. I never, ever had to add anything. I had 4 oil samples done by Blackstone and fuel contamination was never a problem.
Mark

[Grit_dog]

Dufus wrote:
I had a transmission modulator valves go south and fill the crankcase with transmission fluid.

Technically this is possible, but you’d have to drive a while with the engine running like ____, exhaust smoking from the atf ingestion and a poorly shifting trans to put a bunch of atf in the crank case.

[wilber1]

Dufus wrote:
I had a transmission modulator valves go south and fill the crankcase with transmission fluid.

Interesting, what vehicle?

[Dufus]

I had a transmission modulator valves go south and fill the crankcase with transmission fluid.

[ksss]

spoon059 wrote:

time2roll wrote:
Or we can just speculate...

Dude... this is the tow vehicle section of RV.net. If it wasn't for wild speculation, there wouldn't be a need for this section.

Wins best laugh of the morning award.

[Grit_dog]

TomG2 wrote:
I see on another forum where owners report of showing more oil on their dipstick at the end of a long hard drive than at the beginning. Mostly with turbocharged engines. Anything to this or explanation?

After 3 pages of comments, most of which have nothing to do with the ecoboost, in general, if you check oil immediately after shutdown, it may read low as all the oil hasn’t drained back. A little low.
Your description makes no sense, but either your eco is making oil or it’s not, so is it?

I don’t know ____all about ecos but 5 min on the old googler told me there is a tsb for the 11-14 models they are making oil. Has to do with cold engine fueling. COLD like winter up north, not chilly down south.
And there’s also an issue with some HPFFs.

But there is no “temporary” high level that magically goes away unless you check the oil parked the wrong way on a slope!!

[spoon059]

time2roll wrote:
Or we can just speculate...

Dude... this is the tow vehicle section of RV.net. If it wasn't for wild speculation, there wouldn't be a need for this section.

[Cummins12V98]

wanderingbob wrote:
I was taught to check oil when it was cold for an accurate reading ?

YES and on level ground.

[miltvill]

I had the same issue with my 2008 Chevy 2500 Duramax. This was a well documented issue at the time. During regen fuel is injected into the piston during the exhaust cycle which which pushes unburned fuel through the exhaust system into the DPF where it burns the diesel particles. Some fuel would find its way back into the oil. Many people corrected this issue by deleting the DPF and reprograming the engine.

The problem was corrected in later years by injecting fuel into the manifold during Regen.