My '00 VW GTI 1.8T will be due for an oil change by this weekend. It will have 50,500 miles on the clock by the weekend. I have plenty of M1 & GC on hand. I would appreciate the BITOGers' opinions on which one to use. They are both the API SL version, if that would sway any opinions. The oil will be in service for approx 12 weeks, which is how long it takes me to rack up 5000 miles. Daytime temps. here in North Alabama during those 12 weeks will be 80°-90°F. I do 95% highway driving at avg. 65 mph. I don't really have a favorite oil between the two. My VW doesn't seem all that picky about oil. So, I will tally the BITOGers' votes at the end of the week, & which ever oil wins, that's what I'll pour in. Vote away!