good catch ! good job doing the oil yourself. you can find websites to analyze the metals/oil. I would document this with your mechanic and save a sample in case the rebuilder balks at a warranty replacement? I would also tear the filter open...notice i said TEAR not cut, i take a chisel and whack a hole in it, use a screwdriver to make the metal proud of the surface and use vice grips to tear it apart like opening a can
