First of all, I'd like to say that this board is truly a blessing! I've been religiously reading it for the past few weeks, and the information contained within is nothing short of incredible. Talk about a great community, and tons of information...I can only hope that eventually, I'll be able to contribute in one form or another. I have a few questions: 1) When SuperSyn came out, I (like many others) quickly raced around town, trying to buy up all of the old TriSyn...as a result, I have about 20, 5-qt bottles of M1 Tri-Syn 10w30... My current change intervals are 3000 miles, so this should last me quite a bit (2 vehicles). 2) My last oil analysis on our Tahoe showed some slightly higher wear numbers; the lab (Blackstone) said it might be due to using 10w30 in a motor intended for 5w30?? Is it time for a new lab?? 3) Opinions on 10w30 in a 1.8T - VW recommends 5w40; I'm somewhat hesitant to use 0w40 because of all of teh FII's. I live in a consistently warm (well, warmer than Wisconsin) climate, so I'm not sure that the 0w would be of much benefit. Perhaps I could trade the 10w30 for 5w30 at Wal-Mart? Thanks in advance for any insight and info.