Milky fuel smelling catch can

Perferd · Dec 6, 2021

Doing my First oil change at 6-7months with 2300kms on the new truck. Before the oil change I emptied the can and found this. There was a heavy fuel smell and it was super milky looking compared to my first check which I posted here. In the first check was clear clean oil compared for sure...

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Treburkulosis · Dec 6, 2021

That looks like coolant in the oil.

Perferd · Dec 6, 2021

Treburkulosis said:
That looks like coolant in the oil.

Another place I post said looks about normal for the time and Temps of the season...

Treburkulosis · Dec 6, 2021

Perferd said:
Another place I post said looks about normal for the time and Temps of the season...

Could be, that is just the old school in me. I have never seen mine do that.

GTyankee · Dec 6, 2021

I would be checking the Oil Dipstick ASAP

( There is a chance that you have a blown head gasket )

I did not realize that in colder climates than my own, there could be a temporary change in the appearance of the surface of the oil

G-Ride990 · Dec 6, 2021

That is 100% normal and this is the reason why you have the catch can.

In colder months you will get more moisture in the catch can which will lead to milky oil in there.

Gero · Dec 6, 2021

Normal in the winter.

GTyankee · Dec 6, 2021

I have not seen that before, but then i live where I don't even own a winter jacket or coat

Perferd · Dec 6, 2021

GTyankee said:
I have not seen that before, but then i live where I don't even own a winter jacket or coat

Lol I'd love to move in then...

WY.Ram · Dec 6, 2021

Mine looked exactly like that on my first opening the other day. And holy Jesus did it ever stink. It was the smell of used oil / fuel smell. The stink that is the only thing I don't like about changing my oil, only my catch can was super concentrated smelling.
I walked over and pulled my dip stick, gave it a good ol whiff and it smelled like oil, first time ever I think. Only oil, clean oil. My 6.4 kinda gets it smelling that way fairly soon I always thought. The HD truck with my HD foot. Lol
But the crap that was removed, omg, it a thing of beauty, getting those nastys out of there.
Definitely worth the effort to install on the engine, 2500 especially I think, but an outstanding addition for all engines. My wife's '21 5.7l trIl hawk is next.

How many miles / kms is that catch from?

huntergreen · Dec 6, 2021

Treburkulosis said:
Could be, that is just the old school in me. I have never seen mine do that.

Looks normal. Do a search in the oil thread. Plenty of photos just like yours after emptying the cc.

buckeyexx · Dec 6, 2021

WY.Ram said:
Mine looked exactly like that on my first opening the other day. And holy Jesus did it ever stink. It was the smell of used oil / fuel smell. The stink that is the only thing I don't like about changing my oil, only my catch can was super concentrated smelling.
I walked over and pulled my dip stick, gave it a good ol whiff and it smelled like oil, first time ever I think. Only oil, clean oil. My 6.4 kinda gets it smelling that way fairly soon I always thought. The HD truck with my HD foot. Lol
But the crap that was removed, omg, it a thing of beauty, getting those nastys out of there.
Definitely worth the effort to install on the engine, 2500 especially I think, but an outstanding addition for all engines. My wife's '21 5.7l trIl hawk is next.

How many miles / kms is that catch from?

I thought I read somewhere that the 6.4 didn’t need a catch can or wasn’t able to install one because of the way our pvc is ram? Could be wrong

CheechDogg.0n37s · Dec 6, 2021

I am actually going to be checking my catch can soon .... I will post pics or video of what it looks like here in Souther Cal as well

DILLIGAF · Dec 6, 2021

Normal, Mine looks like that as well. At -40 it looks like chocolate milk...lol....

blue ghost · Dec 6, 2021

thats normal, let it sit for a few days and its just moisture. get it checked if concerned.

Nick@GotExhaust · Dec 6, 2021

Totally normal. Thats condensation mixed with oil. No reason to worry, you are good to go!

Wild one · Dec 6, 2021

buckeyexx said:
I thought I read somewhere that the 6.4 didn’t need a catch can or wasn’t able to install one because of the way our pvc is ram? Could be wrong

Oil Catch Can 6.4L

I read a lot of posts on here and other places on the web about “blow back” on the 5.7L. I recently traded my 1500 w the 5.7L in for a 2500 with the 6.4L. Is a catch can still something I should consider in the 6.4, thoughts? If so, any concerns about voiding the manufacturer’s warranty? Thanks!

www.ramforum.com

buckeyexx · Dec 7, 2021

Wild one said:
Oil Catch Can 6.4L

I read a lot of posts on here and other places on the web about “blow back” on the 5.7L. I recently traded my 1500 w the 5.7L in for a 2500 with the 6.4L. Is a catch can still something I should consider in the 6.4, thoughts? If so, any concerns about voiding the manufacturer’s warranty? Thanks!

www.ramforum.com

That’s awesome! So maybe something can be made but it’s not produced for retail sale. Yet anyway

BlackSheepRebel · Dec 9, 2021

i'm ocd and dump mine after every long trip... haven't seen the milky look yet, but this will be my first winter (and it takes awhile to cool down here). strong fuel smell every time. i'm an oddball i guess, i don't mind the smell of fuel/oil lol. i do love knowing all that junk was filtered out though. one of my favorite mods for sure.

Copper93 · Dec 9, 2021

Pretty normal for this time of year. Do you do any long drives or they mostly short trips? If the oil doesn't get up to temp, it doesn't get a chance to burn off the moisture. Even if the engine temp gauge shows in the normal range, the oil may not be getting warm enough to cool off the water vapor.
Also the purpose, of the PCV is to reintroduce unburnt fuel back into the system. That is why you are smelling fuel. The engine runs rich due to the colder temperatures and excess fuel is being circulated back to be used again.

Milky fuel smelling catch can

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