Stick-On Magnets

[Master ACiD]

steel cans blocks most of the magnetic field making magnets on steel filters almost worthless.

you would need to put the magnet inside the filter for it to be effective.

 

[Kestas]

I too put a magnet on steel to see its drawing power on the backside. I couldn't detect any drawing power, so it's be useless on the outside of an oil filter. This was a regular magnet, not neodymium.

 

[bonnie john]

i put a 2 inch speaker magnet on the OUTSIDE of the oil filter of my harley. when it broke up a roller cam follower, all the little pieces were sitting in the end of the filter when i cut it open...

 

[kc8adu]

i grab every dead harddrive that i dont need as an organ donor for recovery jobs to get the magnets.
seagate full height barracuda sca scsi have the best magnets.i get a ton of st19171wc when i rebuild raid arrays and now i have magnets in every oilpan i have removed on all my vehicles.
transmission,diff,tc,oilpan,ps you name it.
use caution with these as they do lots of damage to body parts unlucky enough to be between them when they snap together!

 

[LarryL]

Don't confuse regular magnets with rare-earth magnets. Rare-earth magnets are very strong and a few of them on a filter will not be effected by the metal can. And if you stick two or three of them together you may never get them apart. We tested magnets on fleet vehicles an concluded that the particles they pickup were large enough to be trapped by the filter. They did not get the smaller particles. So their benefit might be getting those particles sooner and it hard to figure that out in analysis. A better solution might be one of those Magnafine adapters that go between the engine and the full flow filter. I would also be hard to figure out the actual benefits of such a system.