Lunyou:
I think folks use negative statements a bit too loosely about Fram. I know of MANY farm trucks that go well into the 200k+ range using only Fram filters and mineral oil. It is more about how much better Wix/Amsoil filters are in comparison. There are reports that show the filters in comparison and it is VERY clear that the Fram does not do as good of job as others.....BUT, whether or not that relates to engine failure at X versus Y has not been shown...at least not to me (I am open to that information). AND, it is very hard to refute hundreds of owners with vehicles that have ran for many miles using a Fram. I think it goes to the question of whether you are inclined towards the absolute best OR what has been working under minimally accepted tolerances YET has proven to be adequate in most of all running conditions. I strongly believe that any filter, if changed every 3k miles, will allow the engine to reach its full mechanical limits.
Just my .02.
However, the Amsoil filter does guarantee it for 25k miles and, in the interest of cost only, might be a better choice-regardless of debate.