Does anyone have any first hand experience or knowledge of full flow filters to use with the Amsoil Dual Bypass system. I am using Fleetguard LF 787, which is listed in th e Amsoil Cross ref as a replacement filter. Yet when I call Amsoil Tech dept, can't get a straight answer about filters that will work as replacement(Wix, Purolator, etc) I realize they want to sell their expensive products, but there are others out there just as good. Would appreciate some comments.