About 8,000 km ago (5,000 miles), somebody posted a question about magnetic drain plugs or oil filters or something. Just for a laugh I stuck 2 'rare earth magnets' about 3/8" diamete on my oil plug. Then I forgot all about them.
Yesterday I did my oil change and discovered the magets (These are really strong magnets). When I removed the plug, there was absolutely nothing in the way of metal debris on it. Nada. Like new. Clean.
Says something about the internal fit & finish of the engine.
This made me very happy.