Funny that!! I got my GTI from them as well. I gave them a call to see what oil the had put in it, as i noticed it said it hadn't been filled with LL oil at the service before i got it. Much to my surprise the service woman said it was a semi synth 10w 40 that they had put in it....
I changed it out for some 5w 30 Shell ultra extra and a new filter last weekend