Ouch, what kind of practical joke is that?!

Anyway, for all you ever wanted to know about motor oil, I highly recommend you check out The Oil Drop forums at
http://theoildrop.server101.com/cgi/ultimatebb.cgi

Do some searching, check out the oil analysis section.
Cliff notes would be that most people there feel that Redline, Amsoil and Shaeffers are the best oils out there. Castrol Syntec is one of the most despised!