as long as it meets the VW 508 00/509 00 specification, it'll be fine which I think is 0w-20 and I \\*think\\* 5w-20
don't go beyond that, while it \\*may\\* not fuck the engine up, those 1.4Ts are REALLY picky (I had one in my Jetta Hybrid and anything past 5w-20 and she was angry )