Originally Posted by DGXR
I use neodymium magnets on the outside of filter cans. Boy, some of these magnets are extremely powerful, made my friend's son cry when he was playing with them and got a blood blister. He was 16 years old.
The way I figure it, any particles kept out of the filter media will extend the life of the filter. I have extended the oil service interval on one of my vehicles so a little extra filter capacity is good to have.
(The site won't let me edit my post so I will quote myself LOL):
I was running a magnetic drain plug before I started using magnets on the outside of the filter canister. When doing the oil service, there was always a small bit of black goop on the tip of the plug... wiped it off and put it back in. But once I started running these crazy strong magnets on the filter, that goop immediately and completely disappeared from the tip of the drain plug... I never have to wipe goop off the plug anymore. To me, this is evidence that the filter magnets are working. Also it's easy to find lots of pictures online where a filter canister was cut open and you can see a pattern of particles stuck inside the can where the magnet was placed... further evidence. But I still run the magnetic rain plug, just because.