go for mobil 1 0w40, drive warm and cold before and after giving it the beans.....
if you go for a track day or drive hard often then put in mobil 1 5w50....
purely technically you can use the 5w50 also on road but it doesn't fulfill VW specs for petrols (cos 502.00 and 503.01 specs allow only up to 5W-40, since its tuned would not give a rats ass about VW specs as long as it's good oil). It's quite similar to 0w40 version so personally would not get a headache using it in my road car (and have done in the past).
just make sure you change it annually or every 9k miles - or more often when going for track days.....