2017 2.3 EcoBoost, factory fill. 2,000 miles, "complimentary" dealer conventional oil change for 3,200 miles then Mobil 1 5W-30 for 7,000 miles. I did an UOA with it and it came back real good, it's posted here. Right now I'm using Motorcraft 5W-30 for 5,000 miles, had it in stock, and then will use the last "complimentary" dealer conventional change for approximately 3,000 miles during winter. After that it it's back to Mobil 1 5W-30, which I've been stocking with rebates. For me the Mobil 1 5W-30 has performed well in my engine so I'll continue to use from now on.
Whimsey