A few years ago the established doctrine on this board was that:
The motorcraft filter was made by purolator, the motorcraft filters made for the assembly line on new vehicles is a different company. It was also believed that the media was different from purone and the regular purolator line. I don't remember what the source was, but they stated that the filter media for motorcraft was different it was supposed to be better then what purolator was but less then the pureone.
I don't know how far back you can search, but this was beat to death relentlessly years ago.
The motorcraft filter was made by purolator, the motorcraft filters made for the assembly line on new vehicles is a different company. It was also believed that the media was different from purone and the regular purolator line. I don't remember what the source was, but they stated that the filter media for motorcraft was different it was supposed to be better then what purolator was but less then the pureone.
I don't know how far back you can search, but this was beat to death relentlessly years ago.