Originally posted by hetfield:
The Motorcraft filters (which are rebranded Purolator filters) are also very good.



...but stick with Motorcraft, in this case. The filter and casing are the same, but the bypass valve on the Motorcraft is in a Ford-spec'd location, different than on the Purolator.

Me, I'm Mobil 1 5W-30 with Mobil 1 filter.

FWIW, the Mobil 1 and K&N Filters are both made by Champion. The Mobil 1 has higher burst strength, greater capacity, and better filtering efficiency than the K&N, but the K&N has a higher flow capacity--good for frequent trips to high rpm range. (i.e., it will keep filtering oil after the rev point where the Mobil 1 filter goes to bypass, but only so far.) Bottom line: Both are very good filters, with slightly different emphasis.

Function before fashion. '96 Contour SE "Toss the Contour into a corner, and it's as easy to catch as a softball thrown by a preschooler." -Edmunds, 1998