Are magnets for an oil filter and a magnetic drain plug a waste of money?

[dubber09]

My concern is, since magnets are on outside they would capture particles stuck to can's inside wall in clusters and such cluster or part of it may get washed off and go thru bypass valve when it opens.
Filter media should trap particles and they are mostly carbon anyway.

 

[ZeeOSix]

My concern is, since magnets are on outside they would capture particles stuck to can's inside wall in clusters and such cluster or part of it may get washed off and go thru bypass valve when it opens.

When the bypass valve opens, only a small part of the total filter flow volume goes through the bypass valve, so the oil flow past the walls of the can shouldn't really change much. Plus magnets used on oil filters like a Filter-Mag (or computer hard drive magnets) are super strong.

 

[dubber09]

I didn't say it would happen but rather that it might.
Personally, I think there is no very good reason for magnets on filters.

 

[ZeeOSix]

Personally, I think there is no very good reason for magnets on filters.

Taking any abrasive particles out of the oil is better than not. Oil filters can't catch a lot of the ferrous particles, but a magnet can. We see evidence of what they catch.

 

[Urshurak776]

Is aluminum attracted to magnets?

My guess is yes, but too shy to make a pass......

JK!

No, aluminum is non -ferrous. I did buy a drain plug with a magnet after my oil change fiasco I posted about a few weeks ago. I'll install it next OCI.

 

[oilstained]

This is what my mags captured.

 

[oilstained]

My concern is, since magnets are on outside they would capture particles stuck to can's inside wall in clusters and such cluster or part of it may get washed off and go thru bypass valve when it opens.
Filter media should trap particles and they are mostly carbon anyway.

From what I can observe, it’s just a smear. If it’s clustering, I’d be more concerned it not being captured by a magnet and flowing around the bearings.

 

[VersysVsWhat]

Is there something like FilterMag that is decent quality but more budget priced?

 

[gasman556]

Would a disc shaped samarium (sp?) cobalt magnet placed on the base of a filter cause bypass spring issues? I’m guessing no, but hope someone smarter than me can chime in. TIA

 

[gasman556]

This is what my mags captured.
View attachment 280533
View attachment 280534

Samarium cobalt? If not, what kind of magnets?