I have used Mobil 1 since 1980 in most of my vehicles and small engines.
YOu can switch back and forth between syn and dino oil with no problems. Way back in the 80s there were some possible problems but that has since been fixed. Most people don't recommend switching back and forth from syn and dino or even between brands, but technically you can swithc. Also technically you will get the best results by sticking with one brand/oil type since the additive packages differ between brands.
Motorcraft blend is supposed to be an excellent blend, and of course is recommended by Ford. YOu won't go wrong with syn, Motorcraft or any good dino that meets Ford Spec.
More important than what brand oil, is that you change regularly.
Good Luck,
Jim Henderson