http://www.royalpurple.com/napa/
go read through this (some very good info in the slide show)
then "take" the quiz (just go to the bottom and press check my answers)
then it will say good job you win a t shirt! (s-3x)
fill out your info and get one sent to you!
he said that they have 2500 shirts then will send hats when they run out