I posted this in another unrelated thread about A3 oil: If this oil isn't just regular 0w30 with more addities, I think the "secret" behind it is the same thing that can be found in the product description of Mobil 1 15w50: It has more SuperSyn in it. The SuperSyn PAO comes in lower vis grades, too, so Mobil may have derived this racing formula from a blend of various SuperSyn PAO grades, with very little (if any) conventional PAO. The more I think about it, the more that makes sense, actually. Again, remember: Mobil 1 trumpeted the "SuperSyn formula" as having been developed in conjunction with racing. I believe this "trick" PAO that George has been told about by someone at Mobil is nothing more than SuperSyn PAO. If this Mobil 1R is not just regular 0w30 with more ZDDP, it's probably a "Super SuperSyn" Mobil 1, i.e., the one grade of Mobil 1 that is built entirely with the SuperSyn PAO. Note the wording of the official ExxonMobil press release: Previously available only to professional racing teams, the Mobil 1 Racing formula combines the best of Mobil 1's patented SuperSyn™ technology with boosted levels of anti-wear additives, giving maximum protection and minimizing internal friction for exceptional power output.