Motorcraft 5W20 syn blend is great, for the price. My last 4 changes, though, have been with Quaker State 5W20 Torquepower full synthetic because I got 24 quarts for 99 cents each. With Motorcraft 820S filters, that's about $10 for a full syn oil change and it works for me (a semi-retired cheapskate).

Now that the last of it is in my crankcase, I will either go back to the Motorcraft or might try some Pennzoil Platinum or something like that IF I can find the right deal.

Any major brand full synthetic (Pennzoil, Castrol, Valvoline Synpower, Quaker State, Mobil 1, Motorcraft, etc) would probably be just fine in the correct weight if you really want to go full syn. I have to admit that my 4.6 really likes the Quaker State, uses just about zero oil between 6-7000 mile changes with 80k on the motor. (I would change the syn blend a bit sooner, maybe 5000 miles, myself.)

If you want to adopt the "designer motor oil lifestyle" or make motor oil your religion, you could go hang out on bobistheoilguy.com and see what the oil of the week is. IMO, they're all just fine.

George