filter magnets

Anybody running filter magnets on their fuel filter or oil filter? I have to think there may be something to this since Allison puts magnets between our filters and transmissions.

Anybody heard of this. Seems like a good idea for the fuel filter especially. Since there is rust in the tanks and lines at the refineries. They make them to go onto round filters as well as flat for trans pans, diff covers and other applications with no external filter. Thinking of becoming a...