Which oil to use in a 1.6 VW Golf MK5?

[felixthesecond]

Does anyone know what oil to use (e.g. 5W-40, 10W-40, etc) to use in a 1.6 FSI Golf? It's about 3 years old and I'm just doing an interim service.

 

[ernie.e]

Synthetic oil 10w 40w