I have a good friend that is sponsored by Champion Oil and while he freely admits being a turbo charged, drag bug the oil doesn't stay in the car long, but he's had good luck with it. By the numbers it looks pretty good:

http://www.championbrands.com/qr/QRracing20w50.html - 1400ppm Zn / 1700ppm Phos

vs. Brad Penn:

http://www.penngrade1.com/Zinc.aspx - 1500ppm Zn / 1400ppm Phos

Does anybody have any experience with this oil?

-Aaron