the leaking story I know:

Check all the hose connections of the oil cooler system and re tighten them. It is most probably coming from there and pollute your engine. I had this problem too. It seems in the assembly they don't fix it well or these hoses are cheap stuff.
For it just came up 2 week ago after 9000 km and was solved in a minute. Its only annoying that everything is oily.

Let us know if this could fix you trouble.

... and check all bolts and nuts and buy some screw glue