Oil leak.....
So, after parking the car on an incline, I noticed a small bit of oil on the ground.
Took the car to the workshop. They checked what they could, tightened some bolts on the sump, cleaned up the area and gave me some options (sump gasket and rear main seal). I decided to monitor it for the coming week, given that it does not seem like a major issue. If it worsens, then will need to go down the diagnosis rabbit hole.
The rear main seal was not replaced as part of the work performed on the car recently, since there were no leaks evident at that time from that area. I will monitor this and see how it goes. I understand that it is a big job to replace that seal.
Anyway, I guess this experience makes me an official, classic BMW owner now
In other news, I am considering sports exhaust options with a specialist. Will update when I decide.