I like WIX too because thats the NASCAR filter but Ive never used it because none of these cheap ass stores around here sell them. So I go to the ole fram filter or the expensive mobil 1 filter. I dont think it matters much if you change your oil every 3000 miles.
I was reading on the Turbo Diesel Register that you shouldn't use Fram filters. Nobody seems to like them because they don't do a very good job. I don't know if this just applies to just diesels or gas engines also.
I run the HP-2004 K&N Oil Filter I buy them 5 or so at a time from Summit at 9.95 a piece. I have noticed that the engine starts a bit easier (less noise) with this filter compared to the Mopar versions. I assume that the filter is what is helping this because nothing else was changed.