[DirtyD]

Originally Posted by El_Tortuga Guess again. Spent a hell of lot more time researching than that. Did not find it on the shelf anywhere else. Can find Motorcraft online, but very close to the same price, so I picked it up at the local ford dealer. Not many choices for full syn 5w50, even less that meet the spec. Castrol makes one that is the cheapest, but doesn't meet the spec. Redline makes one and meets the spec, but is even more expensive. Mobil one cost is similar but doesn't meet the spec. Royal purple doesn't show as making it. Maybe amsoil, but that ain't going to be cheap either. Not many cars spec 5w50. E.g. GT500, BOSS, track pack, and Lexus LFA.

Even for track use I think many people have said that 5w50 is overkill.