re: Is a magnetic oil drainplug worth the money?

Hum... never heard of this before. Off the cuff I'd assume the filter should catch anything that could be caught by the magnet; and I'd think that a magnet as small as the plug wouldn't be very effective.

However, could one attach a set of rare-earth magnets to the entire underside of the pan? That'd give a rather large surface area to collect material. But that's also give a large magnet to collect shite from the outside too.