I was at the Motorola 220(CART) yesturday and trackside all weekend for work. Our company does some of the certifications and telemetric for the Indy cars. Naturally I was taking to the mechanics in some of the Indy cars and most of the TransAm cars. There have been many threads that bash Mobil 1 because of some "webpage" or "rumor" they heard. Let me tell you my "up-close" observation, almost EVERY TransAm car uses Mobil 1 0-W40 oil even.... are you ready.... the Royal Purple sponsored car. They do not even use their own oil!! and they are the primary sponsor which means their name is the largest on the side of the car and wing. Indy teams are very quite about there cars, but I can tell you that I saw about 25% of the cars and they also use Mobil 0w-40 oil and are not Mobil1 sponsored. Well, I figure I would put another tread out there for people contemplating "which oil the use". Interesting findings though. :> )