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Has any body ever seen this inside there Oil Filler tube?
I was at my shop today changing a vacuum hose when i decided to just twist open the Oil Filler cap. Not expecting white gewy crap to be in there. I checked my Dip stick right after, but no sign of milky oil or anything out of the ordinary.

I Did do an oil change (the first oil change ive done on this car actually) a couple weeks ago. I've used Shell 20w-50 not that i think it has to do anything with that stuff being in there, but hey you never know!

Its a 10 Anniversary BTW (My first car/first rotary)
Car is Completely Stock Except for a Cold air intake and Exhaust.

 

condensation.
..called "Lung mustard" by some guys.
It's somewhat normal.

BUT if you find you are having any coolant issues,then NO it is not normal.

 

Yes condensation caused by coolant in your oil, or water in your oil. If you haven't already solved the issue, just do an oil change after you run a little engine cleaner through it. Make sure to follow the instructions because even I don't trust that stuff. But it does get gunk out.good luck!

 

No coolant problems for sure. Is there a remedy too preventing this so called "lung mustard"?I've seen a couple of threads of guys drilling holes on the oil cap. Not to fond of that idea since I'm a stickler for stock! What does Mazda say about that stuff? Any TSB's on it?

 

https://www.rx7club.com/showthread.p...171&styleid=16

 

I don't know if you can get rid of it easy or not but I've seen it in other cars as well.

 

Happened to my 86, change the oil and drive a bit more.

 

I don't know about your modern car, but on an fb run a tube with a pcv valve to a vacuum source.