[carl_2112]

The photo in the original post doesn't look normal to me at all. My oil catch can has always caught oil. I just emptied mine after a few thousand miles (not really sure, just a guess since I don't empty it that often). I have a 2014 Forte5 Ex with 62,000 miles now. I've had a Tork Motorsports tune since May 2019 (at 49,000 miles). I added my catch can at the same time I had the tune done.

 

[ForteGT2]

The only way it should look like the OP's photo is if the car sits out in the weather all the time and the local temperatures fluctuate a lot with extreme humidity - like when you come out and the car is completely covered in dew. However, it's hard to believe it could get that much moisture in the crankcase to cause that.

 

[ForteGT2]

I just washed my car and while cleaning under the hood I drained the catch can - Just over 1000 miles:

Note: The orange look of the catch can threads is reflection of my red shirt I was wearing - not corrosion or moisture.

 

[Oleksandr_Shevchenko]

The only way it should look like the OP's photo is if the car sits out in the weather all the time and the local temperatures fluctuate a lot with extreme humidity - like when you come out and the car is completely covered in dew. However, it's hard to believe it could get that much moisture in the crankcase to cause that.

Thats probably it. I guess theres a lot of petrol vapours in my crankcase because the catch can contents smell like gasoline. My coolant and oil both look the way they should. I drive kinda hard a lot, but idk if that has anything to do with it.