I do a lot of lurking over on the WERA forums for parts and general entertainment and came across this "what oil you use" thread with a poll. The high sample size and the fact that it's on a forum where the majority of users are racers intrigued me and I thought others might find it interesting. I was actually a little surprised by the results. Here's the link:
http://forums.13x.com/showthread.php?t=272758
http://forums.13x.com/showthread.php?t=272758