This is a very informative document on oil that I got from another thread over at www.club3g.com. It's very long, it's very dry to read, (no pun intended) but it's very informative. I know we have more than a few auto geeks in here that would find this interesting to read. This is the same one I posted over at www.mymitsuph.com

http://63.240.161.99/motoroil/