i got my Octavia vrs serviced at the vw shop in Kensington Sydney and was told the turbo was leaking oil and I should get it looked at under warranty (2 years old).

dealer (north shore) says nothing is wrong

if the bearings go pop just beyond the warranty period can I do anything to cover myself now? like get something in writing? I hate telling people how they should be doing their job but feel like I am stuck between two opinions. Service place seemed pretty sure it wasn't something trivial. car is not blowing smoke (yet).