Went with Motorcraft replacment filters from local Advance. Was not that hard to be honest... pretty easy. I started by draining the water seperator and I had pretty much no water, maybe 1-2 drops. The filters were not as dirty as I expected. I think the owners manual recomendation of 15k is dead on. I have about 12.8 currently and they could of gone 15k w/out thinking about it. So I'll be sticking with the books interval.