Dear engine talk community, I did a test drive with an Audi A3 today (https://suchen.mobile.de/vehicles/details.html?id=377550217). It was all tip top, I’m generally thrilled. Except that on the inside of the oil cover was this white slime. Photo: https://i.imgur.com/k8hh9P9.jpg (or attachment) There was also a relatively large amount of white smoke/Qualm out of the exhaust (but only at the beginning). I approached the seller and he pushed it to that that the car came out of the exhaust (but only at the beginning). I find the price of 20980 € also relatively cheap compared to other Audi A3 vehicles with similar data (kilometre level, year of construction, equipment) on mobile.de. That makes me a little suspicious. However, I am a car noob and wanted to ask about this forum, in which I was so far only silent reader. How do you value the white surface on the photo (link above or also in the appendix)? Look forward to your input, thank you already!