https://www.fordservicecontent.com/...a&div=f&vFilteringEnabled=False&buildtype=webIMO Stay with mobil 1 EP 5w30 Change every 5000. Add lubromoly injector cleaner. Berryman, or Techtron to your fuel every oil change. be sure your crankcase ventilation system is working properly. Use the proper octane fuel that the engine requires. To low an octane will increase cylinder peak pressures and add to oil dilution. If you have gas /oil dilution your level should rise some at first and then may start using oil as it gets more and more contaminated. Are you using oil at any point during the OCI? If not and your oil level is consistant, it probably isnt a deep concern however these engine do get a work-out.
Here is the link to fords site. To simplify it calls for 0w30 or 5w30 oils API SP Including the WSS-M2C961-A1. Mobil 1 5w-30 ESP meets these specifications and is one of the newest ratings for oil.