So it looks like I have a slight oil leak, maybe not a leak per se as it does not seem to be dripping on the floor just yet but I had a car on the lift and apart from a small gearbox fluid leak that I know about I also found another one which is black and looks to be engine oil. Any usual places to check? Do these have typical oil leak places? It is a 3.6 TDV8.

I did check oil level and it seems to be OK but would like to take care of it sooner than later as it now sits in my brain making me listen to the car engine sound wondering if it works dry or not and would prefer to listen to music as that is my first diesel ever and cannot say there is much to listen to there anyway.