I got my pair of Filter Magnets installed today.

[UncleDave]

This was the custom made (super strong and extended design) magnetic drain plug (by a company that doesn't make them anymore) ran in my Tacoma for 4000 miles from odometer mileage 1000 to 5000. It was installed at 1000 miles on the first break-in oil change. There was a lot of captured debris. Could a Filter Mag have caught more? ... maybe, but maybe not either. It probably would have caught it faster. I'm betting a UOA with this amount suspended in the oil would have shown a higher Fe ppm.

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You've shown that prior.
I'd certainly be pleased with the initial catch and progress.
The extension into the pan no doubt helped.

 

[ZeeOSix]

Here's what it looked like with 50K miles on the engine with a 4500 OCI. It doesn't go down much from this with more miles on the engine ... there's always engine wear going on.

 

[Carlostrece]

This was the custom made (super strong and extended design) magnetic drain plug (by a company that doesn't make them anymore) ran in my Tacoma for 4000 miles from odometer mileage 1000 to 5000. It was installed at 1000 miles on the first break-in oil change. There was a lot of captured debris. Could a Filter Mag have caught more? ... maybe, but maybe not either. It probably would have caught it faster. I'm betting a UOA with this amount suspended in the oil would have shown a higher Fe ppm.

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A Filtermag could have for certain caught it sooner because a pair of Filtermag could been installed before driving off the dealership's lot, and a pair of Filtermag provides a much larger surface area than any magnetic drainplug.

That said, I also have a magnetic drainplug (Goldplug).

 

[Carlostrece]

Filtermag wraps around outside of oil filter, thus grabbing magnetic metallic particles from the oil before the oil goes through the oil filttation media.

Thus Filtermag and Magnafilter are a prefilter for ferrous particles. The oil filter's filtration material (cellulose for example) is the 2nd stage of filtration for ferrous particles.

This makes it difficult to know how much of the ferrous particles the filtration media would have caught if there was no magnet. Thus all the debates and discussion regarding effectiveness of magnet(s).

I think the best testing method would be to have a post-filter magnet in the outflow oil coming from the filter. Then compare (over 5K or 7K OCI) how much metallic crud the outflow post-filter magnet caught with and without Filtermag prefilter installed over the inlet flow.

To do a proper test of what an oil filter misses that a magnet grabs, we need to figure out a (safe) way to put a magnet in or around the outflow. i.e. - we need a post filter magnet for testing purposes.

 

[ZeeOSix]

I think the best testing method would be to have a post-filter magnet in the outflow oil coming from the filter. Then compare (over 5K or 7K OCI) how much metallic crud the outflow post-filter magnet caught with and without Filtermag prefilter installed over the inlet flow.

To do a proper test of what an oil filter misses that a magnet grabs, we need to figure out a (safe) way to put a magnet in or around the outflow. i.e. - we need a post filter magnet for testing purposes.

It would be easier to do a test like I described in post 33. Run the oil 7K miles, take a UOA samples, then put some super strong magnets all over the steel oil pan, drive another 200 miles and do a 2nd UOA samples. Send samples to 3-4 different test labs for accuracy comparison. Could even drop the pan with the magnets still installed on the pan and look at what they caught.