Burnt brownish oil fill tube

During my oil change a few days ago I noticed my oil fill tube was starting to turn a burnt brownish color. Is that anything to be worried about. I snapped some pics but it’s kind of hard to tell.

 

Looks fine to me - I wouldn't worry about it

Hopefully others will chime in though.

 

It's NORMAL

/thread

 

Seen this on mine, always used full synthetic for what it's worth.

 

Probably rust.

 

I use full synthetic too, valvoline specifically

But it’s on the plastic fill tube?

 

It's probably just collected deposits from the hot oil, heat rises. Who knows.

 

Looks like a metal ring?
Idk Ive never examined my oil fill tube lol

 

Lol no it’s just a plastic tube, it does look metallic but that’s just cause there’s oil on it and it looks shiny with the sun beating down.

 

Probably a very small amount of condensation mixed with a very small amount of dirt/dust/plastic/oil residues. Wipe with a rag and good to go.

 

Mine has this, but worse. I have been using Mobil 1 EP, but this OCI I'm running Penzoil Platinum. I think mine is from doing daily short trips where the engine doesn't get to fully warm up. I wiped it down at the last oil change, gonna see how it looks at the next oil change.

 

Looks normal to me

 

Short trips, cooler weather, humidity, a partially clogged PCV Valve can cause this as long as you're not adding coolant regularly, keeping up with oil changes and the oil on the dipstick looks good you're fine. The plastic fill tube gets cooled by the fan drawing the moisture. Your deposits appear minimal.

 

Completely normal; during the winter time you may even notice a milky color oil on the cap itself.