oil filter mag & mag drain plug, which one and where to buy?

Originally Posted by H2O_Doc

Not sure of that (maybe). With a magnet on the pan, however, you could use a larger and stronger magnet that could pull more metal out of suspension. Also, larger surface area would inverse your probability of capture. Plug magnets have a relatively small (point) surface area.

Not sure about filter magnets, stuff that passed through modern filters must be tiny.

Would make an interesting experiment.

Originally Posted by DEpointfive0

Well, I think you're more holding the crap to the wall of the filter so it doesn't clog the filter element. I think either way the amount of metal cars shed isn't much, we just do it because it makes us feel better.
And $2-60 investment on $30-50k isn't much