If you run it in on fully synthetic you will be rebuilding the engine again due to premature bore wear!

Fully synthetic oils provide too much protection and stop the rings bedding in. The mineral oil will allow the very essential process to take place. If it doesn't take place then you may find that the engine starts to smoke with VERY little milage on the clock. You MUST run it in on cheap mineral oil. The turbo won't mind the oil in the slightest while you are running it in.