Well after finding out what oil I needed (thanks guys) took my car in for an MOT today at VW Bolton to be told it looks like I have an oil like coming from the turbo

I had a new engine fitted under warranty (chain tensioner fault) and was advised today to get in touch with the garage that did the engine work (VW Stockport)
A couple of questions:
1. When they renewed the engine will they have fitted a new turbo?
2. What are the probable causes?
3. Will it be expensive?
PS she passed her MOT
