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Oil Filter Magnet Technology: How FilterMag Helps Protect Your Engine

Writer: Dave LeGear
Dave LeGear
Sep 4
3 min read

Chrome cylindrical Filtermag filter cartridge with black end caps and bold red-and-black logo on a white background
FilterMag oil filter magnet shown installed around a spin-on oil filter.

How FilterMag Helps Protect Your Engine:

If you run a 4-stroke outboard, tow vehicle, RV, inboard, or other hard-working engine, clean oil is one of the cheapest forms of insurance you can buy. FilterMag technology adds another layer of protection by helping capture the fine ferrous metal particles that standard oil filters may not always stop.


As discussed in our first FilterMag article, this is a simple idea with some smart engineering behind it. Many engines and drivetrains already use magnetic drain plugs because metal wear particles are part of mechanical life. FilterMag takes that same basic principle and applies it to the outside of the oil filter, where its magnets help hold fine metal particles against the inside wall of the oil filter until the filter is replaced.


How FilterMag Technology Works:

How exactly does it work and help mitigate engine component wear?


Ad showing a dirty oil filter and magnified metal particles, with text about lubrication and FilterMag capturing wear debris.


Why Quality Oil and Filters Still Matter:

I already use high-quality Oil Filters and expensive Synthetic Oil, is this not enough?


Infographic on engine wear and oil filter protection zones, with diagrams, arrows, and bold red-black panels.
Infographic on particle filtration and wear, with chart and quotes, showing smaller particles cause greater engine and bearing wear.

Will the oil filter magnet affect electronics?:

Will it create issues with my Engine Computer control units (ECU) or other sensitive electronics since it is a large-sized magnet?


Infographic about FilterMag CT magnetic field technology, with exploded filter parts and text on flexibility, magnets, and shielding.


Where It Makes Sense:

For boat owners, truck owners, RV users, and anyone trying to protect an expensive engine, FilterMag is worth a closer look. Start by confirming the clearance around your oil filter, then match the correct FilterMag model to your application. If needed, contact FilterMag Technical. Their team has been helpful when matching the correct FilterMag model to a specific application.


Close-up of engine components with a yellow tape measure stretched across a black round part, showing red and black cables.
Checking clearance and filter size for Filter Mag Tech to help match up on for a Yamaha F70

Try one and see how much longer your oil appears to stay cleaner. Those sub-20-micron ferrous particles that may pass through standard oil filter media can be captured and held inside the filter, instead of continuing to circulate through an expensive engine. I recommend starting your search with the FilterMag fitment and product information for marine, automotive, truck, and RV applications.


Final Thoughts:

For me, FilterMag falls into that category of products that is simple in concept and just makes sense.


It does not replace quality oil, a good oil filter, or a proper maintenance schedule. Instead, it adds another layer of protection by helping capture those fine ferrous wear particles and hold them inside the filter rather than allowing them to continue circulating through an expensive engine.


Whether you are protecting a 4-stroke outboard, tow Vehicle, RV, or another hard-working engine, start by checking the available clearance around the oil filter and matching the correct FilterMag model to your application.


Want to take a closer look? Visit FilterMag to review their fitment and product information. And if you decide to order one, use promo code FlatsNation10 to receive 10% off your order.

A little extra protection is a whole lot cheaper than rebuilding an engine. 😉



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Tight Lines, and God Bless!

Dave and the Team


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