Mine has a little bit of noise, not like diesel as we have an S80D5 for comparison. The T6 is at 212,000 km.
I use the correct A5/B5 oil rating in synthetic as required.
They do use oil,check the level weekly and buy the aforementioned oil for top up at home.
I do have an IPD torque mount on top left looking into engine bay from front, it makes a bit more buzz evident.
Check that mount yourself, take photo for here.