Wow i havent seen oil foam or froth for a long time so was shocked and scared when i took my oil cap off and noticed the inside of the oil cap had some “yellow” oil froth/foam on it.
now understand its winter and condensation happens which can create said foamy froth. But this bothers me... a lot and we see this in people catch cans. Which makes me want to install mine even more now but am having a helluva time finding the right parts for the hose on the N18 engine
im using mobile 1 5w/30
the oil is not quite 3 months old
it held its normal tan color almost this whole time until a couple weeks ago when i noticed it was finally turning black.
i can only imagine how much of this gunk is getting pulled into the turbo and am taking off the small tube the feeds the turbo inlet from the valve cover to look at that too but what do you guys think?
Should i be concerned or pretty normal for winter with these engines?

​​​​​​​i wish i could i live too close to work.

thank you sir i appreciate you takin the time.
the winter hasnt been kind on my car. I already have the death rattle and have an appointment for a possible $1400 timing chain replacement. It only rattles a little for a few minutes after a cold start but that, the oil foam, odd slight surging idle, wierd idle at a stop light and overall just running.. wierd, just has me a little worried.
The place that is going to do the work said they might be able to do the HPFP under factory extended warranty and i asked about the turbo if the wastegate is bad they would look at that too and see if that is possible since i am still under 120k. They said they would look at possibly doing both. I have an aftermarket extended warranty on the car thats going to cover all this work regardless but overall something has changed in the last week that wasnt there the last two months

i noticed yesterday and today an odd sucking noise or high pitched blowing noise,mcant tell which, that wasnt there before. I checked the intake tube and all looks well but i havent removed it looking for cracks in yet yet.
The surge is just a couple hundred rpms after starting it, i cant tell if its just the cold and the computer trying to do its job or what but something is wrong, just need to figure it out or let the mechics find it. No codes are showing on the schwaben but doesnt it aint off.
but slightly running rough is literal, some may not notice it, i do, it wasnt there before.
lastly there is an odd noise, only happened maybe three times, that sounds like an old water pump going out. Like an 80's or 70's carburated engine where the bearings are going out on the water pump. It aint all the time, and only during startup. If i shut off the car wait a few seconds and start again it goes away. That scared me more than the timing chain noise because that sound could be anything, and it doesnt happen enough to know where its coming from. As i type this i suppose it could be turbo bearings from the extreme cold but that means its bad.