Thats the point no one makes theur own filters.I worked in a company that made thermostats.Oe was just like some aftermarket except for id stamp put on in final testing.talked to the boys at place indicated.They said sevral oe and aftermarket filters are the exact same except for paint and stencil.So if you find a good filter Wix and baldwin are in some of the best use it.If it looks cheap feels cheap its junk.On my truck with 300k some filters will rattel the engine when it starts.Motercraft isnt one of them.Thats what I use.Dont use junk but good aftermarket would be ok.If your buying them 12 for a dollar I wouldnt screw them on my lawnmower.