Motorcraft is the best!
I ran dominator through winter. No issues at all. [MENTION=9]HolyCrapItsFast[/MENTION] suggests sticking to the normal 5w-30. You can opt for the high zinc one as well. I forget the exact name.
I ran 10w-30 dominator with no issues. I never tracked/autocrossed ect. My car was a dd at the time and i change my oil every 3k miles regardless of brand. (Been through a few. I love amsoil the most) we have a thread where they go into a lot of detail. I believe it was the royal purple thread. Search for it and itll come up.