Oil cap leak if you want to skip the video...
2006 330ci ZHP - Silbergrau Metallic / Stoff Laser/Anthrazit / Alu Black Cube trim / Adaptive Xenon headlights / HK hi-fi system / heated front seats
Lol John in VA doesn't want to help get clicks!
Embarrassment of not finding that is a small price to pay compared to the oil pan and VGC I just had a mechanic do for mine..
I clicked on this thread to see if OP would make a video about it lol John in VA saving me time. Did he at least show how he fixed it? lol