I got my pair of Filter Magnets installed today.

[Hatsuwr]

One thing for sure, they will need to be very strong magnets, as the field on the inside will be quite weak, and weaker when hot.

There is a configuration called a Halbach array that focuses the magnetic field on just one side of a set of magnets - I'm fairly sure the FilterMags use this.

I wrote a bit about the topic here: https://bobistheoilguy.com/forums/threads/regarding-magnets-on-oil-filters.388954/

I designed a fully parametric retainer model that should adapt to any right rectangular prism magnet size and oil filter diameter. Got a little sidetracked with other projects, but it's ready to print and test whenever I have a bit of free time.

 

[Hatsuwr]

He needs to do a full OCI of at least 5K miles on a gas engine with and without a filter magnet. Not just drive 500 miles and then put a filter magnet on for 20 miles. That would be a useless flawed test.

That channel hurts to watch... He puts so much time and effort into his tests, but there seems to always be serious (and easily avoided) issues that make it really hard to draw useful conclusions from them. I really appreciate his dedication, but so much could be improved just by asking for input on the methodology beforehand.

 

[Carlostrece]

There is a configuration called a Halbach array that focuses the magnetic field on just one side of a set of magnets - I'm fairly sure the FilterMags use this.

They do focus the magnetic field in one direction (into the oil filter).

 

[CarlB]

Answered in post 110.

Norias life extension tables show life extension per code drop.
881825 also discusses micron reduction as it relates to wear reduction.

How you wish to achieve the drop or drops is up to you.
Also up to you is what is or isn't meaningful in terms of extension.

Where's the evidence that the magnet causes reduction? (Beyond what a filter would catch)

 

[Pablo]

There is a configuration called a Halbach array that focuses the magnetic field on just one side of a set of magnets - I'm fairly sure the FilterMags use this.

I wrote a bit about the topic here: https://bobistheoilguy.com/forums/threads/regarding-magnets-on-oil-filters.388954/

I designed a fully parametric retainer model that should adapt to any right rectangular prism magnet size and oil filter diameter. Got a little sidetracked with other projects, but it's ready to print and test whenever I have a bit of free time.

Thanks! Great thread.

 

[Pablo]

Where's the evidence that the magnet causes reduction? (Beyond what a filter would catch)

You mean wear reduction?

It’s inferred from my reading. A magnet can catch particles under 20 microns. Most filters can’t.

Now how much wear these smaller particles cause in any given engine varies but there is some. Enough to worry about or statistically reduce engine life? Unknown

 

[CarlB]

You mean wear reduction?

It’s inferred from my reading. A magnet can catch particles under 20 microns. Most filters can’t.

Now how much wear these smaller particles cause in any given engine varies but there is some. Enough to worry about or statistically reduce engine life? Unknown

I wasn't looking for evidence of the correlation between wear and oil contamination (lots of that exists). I was looking for evidence of the filter magnet reducing contamination beyond an oil filter alone.

Like you said, the engine life impact is a different issue, plus involves lots of other variables.

 

[Pablo]

I wasn't looking for evidence of the correlation between wear and oil contamination (lots of that exists). I was looking for evidence of the filter magnet reducing contamination beyond an oil filter alone.

Like you said, the engine life impact is a different issue, plus involves lots of other variables.

Again inferred. But some kind of controlled designed experiment would be great.

1) We know magnets CAN catch 3u-20u Fe particles
2) We know most filters WON'T catch most particles under 20um
3) So the inference is they are catch-able.