I have been a member for about 4 years now on here and have seen tons of people asking about what filter to use on their super duty. Every time the unanimous answer is Motorcraft because it's the best.
I have always used Amsoil EaO filters on my Powerstroke. My 6.0 had one in the filter housing and an Amsoil bypass filter on top of that. When I would change the oil it had no diesel dilution smell and was not pure black like all my buddies running the Motorcraft filter.
Did some researching to see what tests had been done on the Amsoil filters outside of Amsoil testing. Found this information on a Bob the Oil guy forum and summarized on this link and very well explained.
Hope anyone who reads it gets what they want to from it.
Your Next Oil Change.com: Really! How Good Are Amsoil Oil Filters?
13' CCSB FX4 6.7, 17"MB wheels, Cooper oversized all terrains, Amsoil 15w40 Diesel/Marine oil with Ea Oil Filter.
2013 6.7 Powerstroke F250 XLT Crew Cab 4X4 First Owner. Amsoil OE 15W40 Diesel Motor Oil. MB Wheels and Cooper 34.5" x 12" tires.
SOLD!! 2006 F250 Lariat Crew Cab 4x2 88k miles, 4" Diamond Eye Turbo Back Exhaust, Amsoil 15W40 Synthetic Heavy Duty Diesel and Marine Motor Oil, Ea Amsoil 15k oil filter, Oil Charge Systems Amsoil Bypass Filter, SCT TSX (no custom tunes yet), Sinister Coolant Filter Kit, Zoodad Mod, Custom Diesel EGR Cooler Delete.