....You may want to consider one of these. It will catch all the ferrous materials, prior to them going through and damaging the oil pump. It will also catch all the particles too small to be caught in the filter. When removed it will give you a 100% visual of all this type of material that has been generated in your engine, making comparisons from one oil change to the next very easy.
Thanks, Allan..
http://antisplataero.com/Magnetic_Super_Plug.html