The M03..... GC (green) that is in my '00 VW GTI 1.8T currently has 7000 (highway) miles on it. It has been in since March. Oil filter is Mobil 1. My original intent was to go 8000 miles on the oil, but I'm getting a little nervous. Do you guys think I'm flirting with disaster, or should I leave it in for another 1000 miles (2 more weeks)? Either way, I'll be getting a UOA. Opinions???