Most correct answer is as stated, the Motorcraft oil.
I use the Mobile 1 in everything else so to keep all the same the coach gets it as well.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
Engine oil and filter recommendations
Look for this Certification Trademark. (The API star is shown)
Use SAE 5W-30 motor oil certified for gasoline engines by the American Petroleum Institute (API).
Motor oil displaying the API Certification Trademark will meet all requirements for your vehicle’s engine.
Ford oil specification is WSS-M2C153-G.
Do not use supplemental engine oil additives, oil treatments or engine treatments. They are unnecessary and could, under certain conditions, lead to engine damage which is not covered by your warranty.
Change your engine oil and filter according to the appropriate schedule listed in the Scheduled Maintenance Guide.
Ford production and aftermarket (Motorcraft) oil filters are designed for added engine protection and long life. If a replacement oil filter is used that does not meet Ford material and design specifications, startup engine noises or knock may be experienced.
It is recommended you use the appropriate Motorcraft oil filter (or
another brand meeting Ford specifications) for your engine application.
I drove an 01 V10 for 8 years and 70L miles using Mobil 1 10-30. I supplanted one quart (20%) with a quart of Lucas Oil Stabilizer and when I traded it in, it was still purring nicely and never used any oil.
Barry & Sue Miller("extended" RVer's, 6 mos + per/year) combined trips.
04 Journey 39K, C-7, 330 hp, towing: 02 Dakota 4X or 2013 Ford Edge AWD, Aero 5050XL, ReadyBrake.