My uncle is a shop inspector for an extended warrantee company. He travels to shops and looks at failures basically to be sure the shop isn't trying to put it to the warrantee company. He said 70 percent of the contaminated oil failures he sees are Fram filters. Often he'll cut them open to take a sample and the paper will not be properly glued in the base so the oil can just flow around it. Fleetguard, Purilator, Napa Gold, Hastings, Wix, Caterpillar... these are good filters. Fram, Castite, and quick lube brands are the ones to be avoiding.
-Scott