As said above and also pull the oil pan if your concerned. That will tell you much more to see what's laying in the bottom. Run a magnet through the left over oil in the pan before you dump it. Too see how much or if any of it is steel. Or if it's just the NORMAL aluminum dust that you will see at every oil change........ If you see bronze or copper colored metal in the pan not good.............. Large chunks of metalic steel............Also not good. Aluminum dust.........Run it till it breaks.