You've asked a bunch of questions, but what I don't understand is, what is your core concern? What makes you ask all of these questions?
Is there some specific concern you have?
Ford knows what they're doing. They spec 5W20, so that's what you should use. If you want better protection, buy higher quality oil.
2012 GT Premium, Brembo PP, MT82, 3.73s, Blk/Blk. Bama 93R, Koni Yellow Rear Shocks, Hawk Ceramic pads, Luxurious & Plush Floor Mats