Changed oil yesterday 215 mi , I used Harley 20-50 reg oil . I used a 5qt oil jug with side cut out for drain pan let it sit for a while and slowly poured it into another jug , before I poured it all out I checked what was left in the bottom , there was more specks than I thought there should have been , then I remembered that I punched holes in the filter and drained the filter in with the rest of the oil . What I learned was that there is metal particles that the oil picks up , but I still don't know if the filter picks most of it up , there was a very small amount on the drain plug magnet . I really wish that I would have kept the filter oil separate , really missed a good chance to learn something . Thanks for all the replies .