The Motorcraft FL-500S oil filter is clearly the best choice in my opinion,and Amsoil 75w-140 for the PTU UNIT and 80w-90 for the RDU gear oil is no doubt the best in the market,had mine changed at 33k which the ocd in me is to blame,probably could of waited a little longer,Amsoil,Redline,Penzoil ultra motor oil changed at a 5k interval seems more than adequate. Z