My 2001 Passat 1.8T just turned over 180K. Current fill is M1 5W-40 HD. I've never really followed a particular brand, just stuck to 5K changes, BIG filter (mann-o-lator from pep boys)and a high quality A3/B3 syn oil. Over the years I have used M1 0W-40, GC, Valvoline maxlife 5W-30, Synpower...