Anything but Fram....
I read a report on oil filters done by someone who literally disected several filters for testing. The results were basically you can get by with most everything else, but do not use Fram. You have to be careful as Fram has several people who OEM their filters such as Quaker State, Car & Driver and I can't remember the rest. Maybe someone else will post the link to that article. If you are shopping at Wal-Mart get the STP or AC Delco.