If they do, they must be very strong magnets - wouldn’t they then magnetize the oil pan? If the oil pan was magnetized, then a magnetic sludge would form on the bottom of the pan and never drain out, right? My oil-enthusiast mind needs to know! Thanks!

Do magnetic oil drain plugs really work?

Caddyman December 24, 2008, 5:25pm 6

They work great, especially in gearboxes. The magnets are powerful and effective.