5w30 for variable servicing, or 5w40 for fixed servicing. That's from VW themselves.
If your engine is burning oil, definitely go with 5w or 0w40, and maybe try a 5w50 if you can get hold of it. Mobil 1 do one.
10w is also OK, but you might get a few seconds of tappet rattling on cold winter starts. Fuchs Silkolene 10w50 is a superb oil.
Just gauge it by what the engine demands. If it doesn't use any 5w30, then there's no reason to move from that. There is no right or wrong answer.