Oil filter Magnet?

DEpointfive0

I use 2 hard drive magnets, one big one on the bottom, one smaller one on the side. They're really cheap too (free -$2), not the $40-60 for a filtermag

Z Ninja

Oil-Filter Magnets Don't Hurt, But Don't Help A Lot | HamptonRoads.com | PilotOnline.com

By Tom and Ray Magliozzi of NPR's hit show Car Talk...

Dear Tom and Ray:

I recently saw a car catalog that had an oil-filter magnet for sale. The magnet was placed on the bottom of an oil filter and was strong enough to remove any metal shavings from the oil stream. Is this product worthwhile, or am I just wasting my money? --* Ron

TOM: These things have been around for years, Ron. They certainly don't do any harm.

RAY: They sell magnets that go inside the oil pan, magnets that are built into the oil plug, and magnets, like this one, that attach to the filter.

TOM: Now, keep in mind that the oil filter itself already removes any metal shavings, or anything else that's bigger than about 25 microns *or about half the width of a human hair. So they do a pretty good job.

RAY: Does stuff that's smaller than that * stuff that gets through the filter * harm your engine? Probably, at least a little. But with the magnet, you'll only get the metallic stuff that sneaks by the filter. You won't catch any soot or pieces of aluminum, which are also harmful.

TOM: If a magnet really made engines last longer, don't you think that GM and Ford would already have spent the three cents per car it would take to build one into the oil plug?

RAY: So I'd have to say that oil-filter magnets fall into the general category of "overkill."

TOM: But if you're the kind of guy who believes in overkill, Ron, then go for it. Do you wear a surgical mask on an airplane? Do you go back and double-check to make sure you've turned off the stove before you leave the house? Do you have your brother taste your food before you eat it? If so, you should get one of these magnets, Ron.

RAY: In fact, you should get two, in case one falls off.

TOM: Seriously, it certainly can't hurt anything. And it's possible that there's some small benefit. But in the big scheme of things, it's not high on the priorities list. Changing your oil regularly will probably extend the life of your engine more than any magnet.

2011 Nismo#91

I use filter mags and a magnetic drain plug. And in the oil analysis's I have done there has been no faster than normal drop off of metals in the oil. (More frequent oil changes would do better in reducing metal buildup) I agree that these magnets are just a placebo, if you want them get them but I would say you're better off having your used oil tested then hoping a magnet will help extend your engines life. With a test you can see a problem and take steps to fix it, with a magnet you're just hoping it will prevent one.

JARblue

lol at the 2.5 year old bump

I'm surprised no one recommended Blackstone oil analysis to the OP. Definitely the way to go if you have any concerns about the metal (or other) content in your engine oil.

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SouthArk370Z

I usually put a magnetic plug in the oil pan but consider it more of a diagnostic device than for filtering. If I notice a lot of particles on the plug, something is wearing abnormally.

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