Community Forums

RTegarini · 12-07-2021, 10:00 AM

I have no solutions but sure am curious how 24 quarts (six gallons!) of oil can just ‘disappear’. Reminds me of Harley oil change threads… after an ‘oil change’ and fill, oil doesn’t register on the dipstick. Or after a transmission fluid change, the fluid is too high. New owners drain the wrong pan or fill the wrong fill. You wouldn’t think that could happen but it sure does. Can’t wait to hear the resolution on this one. -RT

Argosy · 12-07-2021, 11:32 AM

https://www.thedieselgarage.com/thre...l-tank.108468/

You've checked everything, into the fuel tank is about the only place it can be going.

wolfe10 · 12-07-2021, 11:40 AM

NO, I would not continue to add oil in addition to the oil capacity spec for your engine.

Overfilling by, say 7 quarts is NOT a good idea! Think crankshaft slapping into oil, excessive blow-by, potential gasket/seal issues.

Jzack · 12-07-2021, 12:57 PM

Look at the dipstick cap portion too for some abnormality or obstruction. Also, I'm sure you are aware of this, but even a slightly non-level coach will give out incorrect readings on the dipstick.

Hope you figure this one out for peace of mind!

Florida Rang · 12-07-2021, 05:35 PM

I have the Solution for your problem,,Pay close attention to what I say because this is how I fixed my problem with the last Coach we had. Unload all of your storage compartments then unload everything inside ,then go get your wife to sit in the passenger seat and both of you go for a ride in the Motorhome. While you are riding around go by your RV Dealer and Trade that SUCKER in and let somebody else worry about were the 7 quarts of oil went to …PROBLEM SOLVED..I did this when nobody could find my Roof Leak…..(including Newmar).

Crasher · 12-07-2021, 05:50 PM

Quote:

Originally Posted by Florida Rang

I have the Solution for your problem,,Pay close attention to what I say because this is how I fixed my problem with the last Coach we had. Unload all of your storage compartments then unload everything inside ,then go get your wife to sit in the passenger seat and both of you go for a ride in the Motorhome. While you are riding around go by your RV Dealer and Trade that SUCKER in and let somebody else worry about were the 7 quarts of oil went to …PROBLEM SOLVED..I did this when nobody could find my Roof Leak…..(including Newmar).

Can we assume that you disclosed to the dealer that the roof leaked?

Monkey Run · 12-07-2021, 07:35 PM

A thought crossed my mind... scary I know. With full capacity per the manual 6.3gal nothing is showing. I wonder whether this is the extra capacity pan and I never really paid attention to it.
Not even certain how much extra that might be.

Tomorrow I'll be finishing the air filter install, which is mission impossible by yourself. At that point we run, watch and also the coach will be in normal height attitude which might, might change the dip reading. Looks level to me that way it sits now though.

RTegarini · 12-07-2021, 08:13 PM

Quote:

Originally Posted by Monkey Run

A thought crossed my mind... scary I know. With full capacity per the manual 6.3gal nothing is showing. I wonder whether this is the extra capacity pan and I never really paid attention to it.
Not even certain how much extra that might be.

Tomorrow I'll be finishing the air filter install, which is mission impossible by yourself. At that point we run, watch and also the coach will be in normal height attitude which might, might change the dip reading. Looks level to me that way it sits now though.

Still not clear how that will account for six gallons of missing oil. How deep can an extra-capacity pan be that 24 quarts of oil don’t show on a dipstick… a dipstick and oil quantity you’ve been using for some time. I don’t even own a diesel but want to know the ending of this story. -RT

THenne1713 · 12-08-2021, 12:27 AM

Well, Got ME confused; internet search says DURAMAX OIL CAPACITY= 9.2 to 10.5qts (with/without filter)... what are you saying holds 24+qts?

Jarlaxle · 12-08-2021, 12:54 AM

Quote:

Originally Posted by Florida Rang

I have the Solution for your problem,,Pay close attention to what I say because this is how I fixed my problem with the last Coach we had. Unload all of your storage compartments then unload everything inside ,then go get your wife to sit in the passenger seat and both of you go for a ride in the Motorhome. While you are riding around go by your RV Dealer and Trade that SUCKER in and let somebody else worry about were the 7 quarts of oil went to …PROBLEM SOLVED..I did this when nobody could find my Roof Leak…..(including Newmar).

No value post.

Jarlaxle · 12-08-2021, 12:57 AM

Quote:

Originally Posted by THenne1713

Well, Got ME confused; internet search says DURAMAX OIL CAPACITY= 9.2 to 10.5qts (with/without filter)... what are you saying holds 24+qts?

That's not that much for a medium duty or larger diesel. My bus takes 7 gallons. The tractors at work take between 30 (Cummins L9) and 44 (ISX 15) quarts.

Monkey Run · 12-08-2021, 03:52 AM

Quote:

Originally Posted by THenne1713

Well, Got ME confused; internet search says DURAMAX OIL CAPACITY= 9.2 to 10.5qts (with/without filter)... what are you saying holds 24+qts?

Hmmm you sure about that? My Dodge pickup 5.9 Cummins holds 20 plus quarts.

blueridgedog · 12-08-2021, 05:26 AM

Quote:

Originally Posted by Monkey Run

A thought crossed my mind... scary I know. With full capacity per the manual 6.3gal nothing is showing. I wonder whether this is the extra capacity pan and I never really paid attention to it.
Not even certain how much extra that might be.

Now you are starting to go down the deep rabbit hole. You had put the right amount in previously and it measured full, so the capacity of the pan has not changed.

RichardE · 12-08-2021, 05:56 AM

In the presence of tons of confounding information, a cornerstone of problem solving is to confirm what you think you know.

If this is stated in the 8 pages, I have missed it. Is this the first time that YOU have changed oil in this particular engine?

Since you have the extractor, remove the oil you just put in, and confirm that you had the 24 quarts in the pan. If the oil is not in the pan, then check the dipstick on the tranny. All of us have zoned out at one time or another.

What makes you think you have an extra capacity oil pan? Found reference on the net? Matched the pan I have against a picture or specifications? How much oil is the extra capacity pan supposed to hold?

You are on to something with the refill not showing on the dipstick.

There are few causes that explain the 24qts not showing on the dipstick:

The oil did not reach the pan
The dipstick is not reading the correct depth
24 qts is not the correct amount

Think about how you can confirm each of the three.