It's old news and maybe just marketing bull, but Mobil used to claim that the Callaway Turbo Corvette and the Porsche 911 Turbo both came from the factory with Mobil 1 and stipulated it's use in the Owner's manual. I dont know if that means diddly or not .............. I dont think you'd catch Porsche recommending the use of Wal Mart oil .......... <img src="/forums/images/graemlins/lol.gif" alt="" />