This is my first OA. I had Motorcraft 15W/40 syn. and changed to Amsoil AME 15W/40 w/EaO filter. I added 12oz Torco MPZ and 12oz Torco EAL to the 15qts of oil. 75% of the 10,900mi. OCI was towing 6000# TT. Following is Blackstone analysis:
7.3L Powerstroke Diesel 2003, Oil Amsoil AME 15W/40...