Why Not to Buy Oil Filter Magnets for Your Car - Myth Busted

[@scottykilmer]

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[@josuevillanueva3016]

Scotty Kilmer I don't see the Amazon link for the common sense, where can I find some? lol jk great video as always.

[@type2523]

Scotty Kilmer hi,I vw heard about magnets that go on the fuel line and decrease fuel consumption,what's you opinion about thn

[@InsideOfMyOwnMind]

Scotty Kilmer Where can I get some of that snake oil without getting bit and how many snakes had to be squeezed to fill that jar?

[@andrewfong2351]

Josue Villanueva

[@gerardoprado8471]

You’re the best Scotty

[@azmrblack]

The best oil filters generally only filter down to 20 microns. The magnets will stop particles smaller than 20 microns from continuing on, and technical papers have shown these very small particles are what do the most damage because they are constantly circulating in the oil system, not being caught by the filter. They aren't necessary but are an added benefit.

[@Pinkielover]

Then they would sell oil filters with the magnets built-in... they dont..It's pretty pointless

[@neodiy]

@@Pinkielover Material is quite rare ...unlike making the common oil filters

[@johnrice1943]

@@Pinkielover why would they do that? That doesn't stimulate the economy. It keeps big business from making money off your losses. can't have that

[@budlanctot3060]

Once again, P.T. Scotty goes off half-cocked. You can't fix stupid(Scotty).

[@nico8587d]

@@Pinkielover I used to rebuild power steering pumps years ago and GM had them inside the reservoir. Seeing is believing my friend. Lots of metal particles on those magnets.

[@peterdubro]

I am not sure you busted any myth - you just stated your opinion. Newer car engines are designed to tighter tolerances and smaller particles can have greater impact. Also - why do a lot of drain plugs provided by manufacturers have magnets if they do nothing? Also - cheap insurance... does putting on a $2 reusable rare earth magnet on a filter break the bank?

[@Andrew__Smith]

🤥 It is a myth

[@PlXELPUNK]

Based on what I've learned watching this video, after you began working as a mechanic, the oil filter was invented and then implemented to help solve or help prevent what I can only imagine to be early engine failure. Oil filters obviously catch contaminates, but what would it hurt to add a magnet either to the filter itself or onto the drain plug? I have magnetic drain plugs on multiple vehicles and every single time I change the oil there are metal shavings piled on the tip of the magnet and I'm using OEM filters on practically new cars! Saying that magnets are "snake oil" and won't capture metal shavings is like saying cars still don't need filters at all.

[@johnjohnson9980]

Google oil filter magnet. Large wrap around the outside of the filter housing. Oil flow goes into the outside of the oil filter housing then though The filter. Magnet on the outside holds tiny metal particles up against the outside housing but on the inside surface. If they were to fall off they would still go to the filter next. Held against the inside of the outer metal housing then you could say if is keeping filter housing cleaner.

[@charlescoker7752]

If anything it would help keep the filter from being clogged with the metal. What filters, or engines need is a way to check to see if the filter is bypassing , or not.

[@McSquiggins88]

Oil filter magnets do work. Cut open a filter after using filter magnets and see for yourself. Even a premium filter will not catch all the metals floating around in your oil. If they are smaller than the micron rating of your filter they just pass right on through. I have personally been using two filtermags along with a magnetic drain plug with fantastic results. My oil appears cleaner for much longer as I check its condition regularly. I changed oil on a vehicle without any magnets, placed some of the used oil in a glass jar and held a filtermag on the jar. Even though the car was running a premium filter you could see the metal in the oil being drawn to the magnet on the side of the jar as i gently swirled it. It works period. Prove that it does or does not work but don't slam a very logical idea with zero data to back it up.

[@davetek490]

How are you sure the magnetic force overcomes the shearing force of the oil when it's under pressure? I'm sure it would catch stuff when the car is turned off, or maybe at idle....

[@MrGarteck]

@@davetek490 imanes de neodimio minimo n52

[@enterBJ40]

Totally agree. Many heavy equipment manufacturers use big magnetic drain plug and drain fill caps in diferentials and final drives . Caterpillar is one of them

[@junehp3507]

Oil filter magnets do work period. The proof is in the pudding. Still love scotty thou.. .

[@XXGunzNClipzXx]

Engines wear down over time anyways metal tends to flow or when the engine was first broken in all that metal it’s still in the car I agree with it being a logical idea because metal in engine is normal not only on a defective engine

[@webchez69]

Scotty, I have been watching you for years.. However, I can recall going back 20-30 years that my Chrysler minivan had a magnet at the bottom of the transmission oil pan. It always had metallic paste on it, which I cleaned. Also the transmission and differentials on my cars had magnetic drain plugs.. They always caught metal shavings in the form of a fine paste.. Cant magnets at least give you an added layer of protection?

[@chrisgraham2904]

I agree, ...and adding magnets to the filter at least won't hurt anything.

[@steven4894]

YES!

[@arttafil6792]

Scotty, Years ago I installed a magnetic oil pan drain plug on a 427 Chevy engine I had rebuilt. I heavily prelubed the engine and ran it at 2,500 rpm no load for 30 minutes to seat everything. I changed the oil and when I looked at the drain plug, it looked like it hfhad as huge "Afro" of metal shavings. I kept the drain plug with that car two trap shavings too fine for the oil filter.

[@underwaterdick]

Scotty, I respect you and I think you are a very experienced mechanic. Be careful in the way you say things though, as people without a mechanical mind might get the wrong idea. Having metallic particles in your oil is NOT a sign of a problem, it is perfectly normal. The second a car is started from the factory it will start to produce microscopic particles of metal and will do until the engine dies... This is one of the reasons we carry out oil changes, apart from degradation of the oil properties. This is also the reason we fit oil filters. The magnetic filter bands ARE pointless, just as you said, because the filtration on a normal filter is so fine. A magnetic drain plug can be a good investment, not just to catch metallic particles, but mainly so you get an indication if there is something wrong inside your engine if large particles start showing up. Aircraft use them in their gearboxes to check the health, and in helicopters they are actually connected electrically to detect any metallic particles when operating. -particles detected means bring that helicopter down before it comes down! Obviously you could go the whole life of a car without getting any large particles, but it is certainly handy on performance and high mileage cars to be able to keep a check on engine health at oil changes.. Keep up the tips!

[@TheWilferch]

Ask yourself.....how many of the metallic wear particles are actually magnetic?. Most engine components today are aluminum..... and bearing material.....the place where contact can occur during startup when there is no oil wedge there...is also made of an alloy of lead, antimony and tin...all non-magnetic. Maybe piston rings, maybe some piston skirt slap on cold start-up, but even here most cylinder bores are not cast iron anymore... altogether not too much of a modern engine that is magnetic where wear particles are concerned.

[@mitch1078]

@@TheWilferch Many cars come with MAGNETIC DRAIN PLUGS so your information is not accurate if car manufacturers are including them!

[@TheWilferch]

@@mitch1078 ...so you're saying EVERYTHING car manufacturers do is the truth and is good for the consumers, eh? After the first oil change where MAYBE there is some machining scarf to remove that may have "hung-around", for all the (factual) reasons I state showing that most engine metal parts are non-magnetic....I stand by my previous comment. I also said that there is maybe SOME value like when piston skirts slap cylinder walls that may be cast-iron.....but how about you tell me where otherwise this magnetic material comes from ? A running engine has an oil wedge on its bearings and on cold start up when there is no oil-wedge developed, the bearings are tri-metal of material that is non magnetic. Steel camshafts likewise rotate on either babbited bearing surfaces or aluminum...etc, etc.

[@mitch1078]

@@TheWilferch Yes not everything has 100% "metallic wear". All I'm saying is the biggest sports car manufacturers in the world are including them (aka FREE) so these must be more important for metallic wear that you may realize. How in the world could there be any disadvantage? The car manufacturers require them for many vehicles and they include it.

[@mitch1078]

​@@TheWilferch​The main reason they are included is to be a "wear indicator" when any metallic wear is abnormal.

[@paulsommers7733]

Magnets do work, the oil filters can't remove super small metal particles in the oil which magnets can.

[@eugenegutierrez5106]

Scotty just plan old fashioned. Just because this guy gets millions viewers doesn’t mean he’s always correct. Magnet does work. All Those micro metal does stick on magnets

[@neodiy]

I believe it works and scotty couldn't prove it because he was blurred by jumping up and down while talking

[@nico8587d]

Sorry Scott, but you are not correct about the magnets. Proof when I pull the magnetic plug when changing oil speaks volumes. The filters only work down to a certain micron and magnetic plugs don’t care how big or small the metal is.

[@steven4894]

​​​@@eugenegutierrez5106 Transmission pans have magnets. Expensive German cars have magnets too. Physics is physics. Further reducing the size of micron oil filters would affect efficiency and flow. Larger, voluminous oil capacities, 20 micron oil filtration synthetic media, .... 🤔?? How do you think 🇩🇪 cars are able to accomplish 1 year oil change intervals? 🧲 😉

[@steven4894]

​@@eugenegutierrez5106 If F---ermag units 🧲 weren't so expensive, most people would use them.

[@averyalexander2303]

I have a magnetic drain plug, and it does work. At every oil change, it has a coating of abrasive metal paste. Not something I'd want running through my engine.

[@videomaniac108]

The oil drain plug on my 87 Porsche 944s was located at the bottom of the side of my oil pan and so I was able to sweep the inside bottom surface of the pan with a telescoping mechanics magnet when I changed my oil. I was able to get a small amount of metallic sludge out of the bottom of the pan and that seemed like a good idea to me. I would also prefill my filter with oil before installing it on the car, to minimize the time the engine would be without oil pressure when I started it after the oil change.

[@hovered4]

I am surprised at your answer to this one. Magnets are always welcome to attract "fines" which if you remember you have seen on the magnetic drain plugs you have been servicing. Super fine material feels like a metallic paste that collects on magnetic drain plugs. Good house keeping would suggest immobilizing any metals any way you can in the oil any where in the system. Fine's sources include ring / cylinder wall wear debris, oil pump gear gnashing, lifter/ cam follower natural wear etc..

[@notrightmeow3357]

I have a geo metro with 150K miles on it. Im the original owner, and it still runs fine. I’ve always used a small magnet on the filter. I think it works 💁‍♂️

[@syndrome7589]

The snake oil bit was outstanding lol

[@davidmiletic6647]

BassplayerDJB I loved it 😂 great video

[@SugaryPhoenixxx]

"It's like closing the barn door, AFTER the horses have already run away!" Oh Scotty you crack me up!

[@bait28]

this had my dying

[@davidjacobs8558]

There is an old Korean saying that goes something like "Fixing the barn after the cow is lost"

[@TTRVision]

I use a magnetic drain bolt , but just for "monitoring" potential oil contamination not for "filtering". and that is on a track car. All the best from Romania and have a nice weekend there in the States !

[@Slazmoservicing4209]

I have a massive neodymium magnet beside my drain plug, thus far its collecting a fine metallic sludge, especially on the drain - similar to whats collected on the diff magnets but not as thick. Its caught a few stray things off the road too... bolts and strips of metal.

[@christopherjameswall5182]

Um.. Magnets have been in oil/transmission pans stock for decades..

[@MrUbiquitousTech]

Um.. This video isn't about those.

[@MrUbiquitousTech]

@Wroger Wroger Golly gee whillikers, that sure was funny, yuk yuk yuk. Now, it's past your bedtime, go nappy wittle fella.

[@hondamancl450]

That's for clutch material ,its common to have more metal shavings in the transmission than a engine

[@63jeepj20]

@@MrUbiquitousTech that is absolutely what he was talking about. At no point did he say the magnets in the pan are ok. Magnets inside the pan keep contaminated oil from splashing onto the crank bearings causing premature failure. There isnt an engine out there that doesnt produce fine particles of metal which end up in the pan. Metal parts with metal bearings will always wear. And having one on the filter is actually a good idea. All it takes is a small hole or tear in the bvb filter element to circulate metal shavings through your oil system.

[@MrUbiquitousTech]

@@63jeepj20 This video wasn't about those.

[@Philosophe27]

Take a shot for every time Scotty applies the magnet to the top of the oil filter. Love your videos Scotty!!!!

[@jdoedoenet]

2:44 "Fuel is not magnetic!" Uh yeah. But it's not the fuel I'm worried about. It's the RUST PARTICLES SUSPENDED IN IT from the tank that I'd rather not have getting to my injectors - or contributing to clogging the inline filter.

[@BlazenWinchester]

great point

[@christhomas1708]

A magnet inside the transmission pan works well. A differential plug with a built in magnet also does some good.

[@heavymechanic2]

I found a magnet that went through a differential, its also common to see them in a transmission, and some drain plugs have a magnet. It may be true that a magnet is not typically needed on an engine oil filter, but they are used to trap iron and steel particles in other fluids. The magnefine filter has gained some respect for its design and Allison has a magnet under the filter for the same purpose. Oil analysis identifies Fe in all fluids and people who are OCD will buy any gimmick even if its not essential. I put a filter on my transmission cooler line and put a small magnet inside the return side and there was stuff that collected on the magnet and all over the filter base, this filter system saved my transmission from destructive effects of contamination.

[@W.451]

OOPS! 99% efficient at filtering particles of 20 microns. 5 micron and larger wear particles cause wear and build up over time. Particles smaller than 20 microns do not filter out well in filters used. Especially 5 to 10 micron sizes and they do contribute to wear. Magnets are to catch much of the 15 micron and smaller particles that cause wear. Particles larger than 5 microns but smaller than 20 that filters DO NOT catch cause wear.

[@steven4894]

​@@W.451 EXACTLY.

[@samg5543]

I use the filter magnets and have for years. If they trap any ferrous metals at all, it leaves more room in the filter media for other contaminants which makes the filter last longer. Makes perfect sense.

[@samg5543]

...then it gets trapped in the media. no problem.

[@ginog5037]

Change your oil every 3k, if your filter gets plugged you have bigger things to worry about😮

[@IndependenceCityMotoring]

Correct, but worth mentioning that magnetic oil drain plugs do work to catch metal shavings. And they help you identify engine issues before they become a bigger problem.

[@Gruxxan]

i bought one of those for my yamaha xt600e. first oil change i did after that there was some fine swarf on it, but every oil change after that it was perfectly clean

[@Remaggib]

I just have neodymium magnets on the tip of my drain plug, so I will know come oil change time if there's an issue. Full synthetic even at 160k and no issues yet, knock on wood

[@michaelws6247]

Yep, always had one of those and it’s always “gummy with metallic paste after after an oil change. Not much, about half the size of a corn kernel but regardless it’s on there and not in my motor

[@michaelws6247]

Haulin' ass Wastin' gas I’ve had the car since 2004 w/ 20k miles and I’ve got just over 62k on it now.(02ws6) Damn piston slap when it’s cold is so bad it reminds you of a 12valve Cummins. I’ve always attributed it to that. I have a lonely short block in the garage just in case it ever decides to go. That was my insurance after GM said the slap was normal ( pre bailout era ) I’ve seen ls1s and 5.3s slap this bad into 200k mile plus and still not grenade but it still freaks me out.

[@tonylockhart1963]

Michael WS6 but as Scotty said, the oil filter will catch that gunk IF it gets sucked up into the oil system. However, the likelihood is that it was just going to sit harmlessly at the bottom of the sump.

[@Snakesht172]

Jet engines have magnetic plugs (we call them chip detectors) in multiple locations of the engine along with the filter. However there not used for filtration but to indicate excessive wear of the gearbox, bearings, starter, and generators. If you find a metal chip during an inspection we have to send out a soap kit and depending on the results pull the engine.

[@ruck-a-tron]

Soap, in the Air Force we called them Joap. Jet oil analysis program.

[@bluefrog85]

Found these talking points on why not to use magnets on the oil filter: Some magnets are designed for and put on the end of the filter. Inside the filter near that area is the bypass valve, which is mechanical (a spring) and magnetic (steel). If your magnet is strong enough, it will alter the pressure at which the bypass opens (not good). If you put a magnet on the side of the filter, you may start accumulating small pieces of metal (that's the point). However, you are also magnetizing those pieces, causing them to stick together in a clump. If enough pressure is created, the filter bypass opens and a chunk of magnetic goop could be pulled from the magnet and thrown into the engine. Not only is this piece large now, but it is magnetic, so it can attach itself to parts of the motor and do more damage than it otherwise would (as microscopic, non-magnetic, homogeneously distributed metal). If you put a magnet on the pan, you can likewise create a ball of magnetic goop. Now you take the magnet off to drain the oil. There is a magnetic pile of goop inside that you expect to drain out with the oil. What if it stays stuck to the pan (is the pan magnetic?)? (not very concerned about this, but it popped in my brain). A very high-powered magnet near a sensor could affect the sensor readings (or cause it to fail). Given how close it would have to be to the sensor, though, I doubt this would really be an issue.

[@steven4894]

Correct. That's why neodymium n52 magnets work best on the sides of an oil filter. 💡 Take off the magnets on your oil/transmission pan before draining hot oil. The heat and oil flow will easily send them down into your oil collection pan. 😉

[@ralphfalstin5337]

I’ve been using just one half of the kind that goes on the side for over 10 yrs. To see that it indeed does work, try cutting an old filter in half and you’ll see all the metal particles attached! It’s just an added layer of protection in addition to the best oil filter-I use Mobil 1 or k&n or wix, nothing else.

[@BlazenWinchester]

Check out the you tube videos where they cut open oil filters. Those videos will show you which to buy and which to stay away from. Always buy a filter with the antidrainback valve.

[@zzman5306]

A couple problems with this: 1. Of course you get metal particles in the engine. Parts sometimes touch causing wear. 2. Filters can only efficiently filter out most particles around 20 microns and bigger. Magnets can help catch smaller particles.

[@KoiBoiRoi]

New drinking game. Take one everytime Scotty claps the magnets together.

[@enriqueb4412]

I was waiting for him to cut open a filter that was used along a magnet to prove it does or does not capture small metal shavings. Instead we got talk and no proof.

[@mmpiforall5913]

When you reduce iron wear metal in the oil all other wear metals drop too! In my case lead from main bearings is now under 1 PMM ( 1 parts per million) Cut open filter pics included! FILTERMAG vs HOMEBREW app.box.com/s/uxvu8dmscf5wcgftutdm0ejqwgn86tw7

[@jimmyers8939]

buy one and find out for yourself, duh.

[@ralphfalstin5337]

Enrique B they do work and the prof is in cutting an old oil filter open.

[@davidanthony8290]

Metal based sludge which is often grey in colour is perfectly normal wear. Metal particles which are large enough for you to feel between your fingers is not. Oil filters will remove these particles making a magnet fitted to the filter useless. The only reason a magnet should be fitted in the oil return line is to attract particles so an engineer can see that an internal breakdown is in process.

[@chrisvig123]

So your going to fall for the magnet 🧲 snake oil device ? Lol

[@BotevVratza1983]

Scotty is the man, he's like that crazy uncle you couldn't wait to sit next at the Thanksgiving dinner table who always had all these interesting stories to tell !!

[@maelradec6766]

yea an inbred uncle who thinks he knows it all

[@brazenbunnies]

Try it. Put on the magnet and cut open the filter after 5000 miles. Scrape of all the metal shaving from the magnetized area. Ask yourself do I want circulating around my engine 100 times per minute for years.

[@JimTMcDaniels1]

Sir Scotty I think you might be wrong on this. Because I've been reading some on oil filters and they only catch down to a certain size micron and it's not very small. If we notice how dark-dirty our oil is in an oil change, we can see much is missed by the filters. Partially why our filters can't filter too small is it would restrict flow too much. One site I read concerning the toilet paper bypass filter from Frantz quoted oil tests that reveal 50 percent more wear from our dirty oil than when it is new and clean because of the tiny particles the filter can't catch. The magnet will only catch the metallic particles but those are probably the most damaging. So I'm sold and gonna buy a magnet. Take care

[@danex070]

It makes more sense to put a magnet to the drain plug. After 30k km someone drained the transmission oil to put a new one and when he checked the old oil there was some metal shaving. Metals shavings can be in the oil pan, since they are heavy they don't flow so it wont go throuh the filter. So a magnet to the drain plug is always good (more expensive cars have this built in the plugs)

[@ryanmcfarland1900]

Every Honda I've owned had a magnetic drain plug.

[@eaglefeather]

In the car I have, a pervious owner changed the bolts on the transmission and oil pan for non magnetic ones... Can you buy bolts with magnets on the tip like the original ones? That's new for me, I'll check it out.

[@jonathanharper7596]

Ivan Lesca yes you can buy replacement magnetic drain plugs. Try Amazon or local dealership will be able to get for sure.

[@MarzNet256]

The transmission pan pan usually has 2-3 magnets inside it. Make sure to clean and replace them when you drop the pan. A small amount of fine particles on magnets is normal. Any bigger pieces and you've got a problem.

[@losojosdehotspanish2162]

danex070 you take off the transmission pan to change out the filter and on the bottom of most transmission pans there is a magnet glued on so it doesn't make a difference to put a magnetic drain plug.

[@cck1496]

Good video. MCDs (Magnetic Chip Dtetectors) are used in aircraft engines to tell the wearing of bearings. The idea basically originated from aviation industry. But automotive industry does not care too much.

[@TheNickLavender]

Some days, I just need some of that "Kilmers" to get me through the day :P

[@lmdetect]

I can confirm that it absolutely does work for lawnmower engines. I have a rare earth magnet that I put on the end of the dipstick. Every time I check the oil I remove that rare earth magnet and get off all the crap that stuck to it, magnetically. My Toro push mower is 14 years old, and starts on the first pull,, every time.

[@Rincon009]

Love these short 'quick tip' videos! Almost @ 1M subs!

[@m0ther_bra1ned12]

Makes sense. I'm studying to be an airplane mechanic (A&P), and we're tought that when you change an oil filter, one of the things you do is cut the filter open to get a sense of how the system is doing. And if you have metal flakes in the filter, shits broken... REALLY broken.

[@mr.skeptical3071]

Love the the Al Capone pic!

[@ioccatonyz1]

There is a reason to use a magnet but not on the filter. I use them on the drain plug so I can inspect what the magnet has picked up. If the magnet is on the filter you would have to cut the filter open to see what has been trapped. Putting a magnet on the filter is a great idea, a magnetic drain plug is a must for easy inspection purposes. The 20+ years I have been using magnetic drain plugs I have only found very fine metal debris stuck to it and not much of it. That tells me the horses are doing just fine, FYI I use M1 fully synthetic.

[@steven4894]

That's because the tip of the drain bolt has a very small surface area, as compared to, say, a 2" x 2" square. 💡

[@thurm101]

Magnetic oil drain plugs will help you monitor the condition of your motor. Of course if metal is in it it’s too late. But if you open up a filter (proof) you will see where the magnet was and what it attracted. Hey to each it’s own. I am not with you on this one Scotty.

[@jianoconnor8414]

Ok my turn to chime in ! Ex British luxury car mechanic here. A magnetic drain plug in engine and gear box is a good idea, to catch those metalic critters before they could flow any further; with the potential for devastating damage. A chipped tooth from a missed gear change; if caught can definitely save the rest of the gear box. Yes agreed if metal is being shead by the motor you have problems. BUT a good idea to catch them as soon as possible. Why NOT have a magnets placed at strategic positions ?!. I cannot think why not.

[@brkooduh66]

i have the wraparound type magnets on my machines at work and my race car. i don't have them to prevent metal from circulating, the true value to me (as a mechanic) is the point of inspection. i cut all my filters open on a PM, it is way quicker to look at the side of the casing for metals. no time consuming spreading the pleats apart making judgement call. Also on some i'm saving money buy not sending out sample for analysis. common sense, ahh, its only common for the commoners, be uncommon

[@YouNameItGaming]

fair call Scotty! they're a great idea on paper, but they're rendered pointless by the fact that the filter already does the job. it's like them no touch soap dispensers. sure they stop the spread of germs, but the whole point of the soap is that it kills the germs anyways. that being said, a mate of mine used to use a magnetic filter on his car and this particular variant had I think it was a 12mm nut on the end of it, the magnetism helped guide the ratchet on when replacing it at the very least 👍

[@rolfwenzel491]

Nice Rant Scotty, but unfortunately you are creating a new myth. The facts are that NO automotive oil filter captures particles below below 20 microns, and these are the particles that cause wear. If you want to see who is doing the science behind this, it is the global mining companies who run $6 million mining trucks and are now putting magnetic filtration on every piece of equipment they own to double the life of oil and filters and hydraulic fluid and coolant and are getting 2x to 3x life out of their equipment. I'd challenge you to take a high quality magnetic oil filter made of rare earth magnets, not some of the the cheap ceramic magnets you showed, put it on your filter for 6 months and then get a lab analysis done. Let's see some more science and less theatrics here Scotty. Come clean here Scotty, is a filter company paying you?

[@mmcdonald9935]

right on the money he should compare efficiency vs micron rating

[@davetek490]

Yeah you need a rare earth magnet at least. Heat KILLS magnets (it jumbles up all the dipoles), and oil filters get pretty warm. The non-rare earth magnets probably don't work well after a while.

[@juliocesarmartinezbustos3254]

absolutely true, greeting from Chile

[@garylangley4502]

An alternate use for the magnet would be to stick it under the rear of a British car to pick up the parts that fall off as it is driven.

[@rmcnasty7319]

Your WRONG , I Have been building Motors, from everything from stock to full-blown roller Motors. I epoxy magnets ,to the outsides of the oil pan ,on the sides and bottoms. And inside of aluminum blocks. On racing motors, I install round magnets, with the hole over the oil return hole in the heads & oil reservoir tank on a dry-sump racing system. Through the years I have noticed large amounts of metal during rebuilds , adhered to Magnetic areas. Attaching a magnet to the oil filter will catch some metal however, I suggest gluing it with epoxy as the magnet can fall off when you hit a bump bouncing down the highway and possibly knocking out a windshield. If you change your oil, regularly with a good Wix filter, you shouldn't have to worry about Metal,. As the filter will take most of it out. It's a fact bearings, and metal parts, will shed metal filings is they wear. Keeping them out of the oil as soon as they're produced before they have a chance to cycle through the engine with the abrasion of a sandblaster. Shortening of the engine life. Other than that I like your other videos. You do have one valid point. It's stupid to pay for a big filter magnet , it's not worth the money. And the oil is flowing to fast through the filter at high velocity, to allow the magnets to capture much. OH Hell , Damn the torpedoes ,Full Speed Ahead, GLUE ON AS many of them little SUCKERS, you can find. Hell, put some on the Bumpers & Dashboard. Even the floor mats could use a few.

[@cajunmandick2985]

You sir have spoken volumes, always put magnets on my drain plug just to see the condition of my rings and. Cylinder walls. They will be a good indicator of these wear points. I ride old sportbikes and typically get around 90-100k miles outta them and this procedure will go a long way to tell me how the engine is wearing.

[@reliasales8365]

i agree as well you will not catch the sub micron particles and buy the way it cost almost 0$$

[@CorvetteTrev]

You'd really just be making the filter less efficient

[@SlikLizrd]

1. The FILTERMAG WILL NOT FALL OFF !! 2. Oil Filters DO NOT remove particles smaller than 20 microns. 3. The FILTERMAG gets out ALL ferrous metal particles, regardless of size. 4. FILTERMAG Magnets are treated to function between -40 F and +302 F -- others are not. 5. The engine oil does NOT flow through the filter fast enough to wipe the metal particles away from the powerful grip of the magnets. The evidence is there to see when the filter is cut open. 6. The FILTERMAG IS NOT GLUED ON -- and is re-usable for a lifetime, which makes it cost-effective by making the engine oil last longer.

[@rootofminusone]

I'm in my early 20s and I don't have even half of Scotty's enthusiasm. man you are fun to watch and learn from.

[@livewireOrourke]

Loved the horses in the barn analogy 😂

[@Fid0n]

Except horses are kept in stables not barns.

[@caedom21]

Scotty is like a teacher, doctor, therapist, mad scientist and cowboy for cars. I’d love to have a beer with Scotty. Go Texan.

[@ToolsOutsideTheBox]

Typically there's a magnet built into the drain plug, keeping metal pieces from blocking the pickup screen and tube, protecting the oil pump....long before it reaches the oil filter!!!

[@jamesm.8392]

Typically in the past yes. Now a days no guarantee. Been keeping a neodimium on the *side* of my oil filter for a long time. Cheap ins. policy

[@shaneintegra]

The drain plug isn't an ideal location for a magnet. The oil filter however is ideal

[@mightywalrus6414]

@@jamesm.8392 What exact magnets do you buy? And where exactly do you buy them? I want to buy some myself but can't figure out where

[@SlikLizrd]

@@mightywalrus6414 The absolute BEST Magnet Kit that is currently available is the FILTERMAG # SS365PR -- Fits all 3.5 - 4.0 inch diameter oil filter cannisters. -- 11.5 square inches of re-useable magnetic holding power, heat-traeted to remain effective from -40 F to +300 F. Lasts a lifetime.

[@dconte24]

You also seem to forget that those particles have to pass through the oil pump before they hit the filter. Almost all Allison transmissions and most aircraft engines use magnets as well. In the end, they don't hurt anything. Also when the oil is cold, the bypass valve in the oil filter will open to prevent oil starvation . When that happens, the oil goes around the filter into the engine components.

[@zzman5306]

I will disagree with Scotty on this. I have used oil filter magnets for some time and have cut open filters. They work. A filter will not catch many fine metal particles. They are usually good at catching down to 20 microns. Magnets can catch the smaller particles. There will always be metals in used oil because metal parts do at times make contact. Used Oil analysis show the "wear" metals.

[@welcometoreality3450]

not many guys use good quality filters, but they are very important!

[@FISHHEAD404040]

Agreed

[@TheRealBmanswan]

the only magnets I swap out are transmission pan magnets. Thanks Scotty for busting this myth for everyone!

[@kirara4953]

Magnetic filter, it filters the filter xD

[@Maserati7200]

Kiraro The Kitsune - yo dawg, I heard you like filters...

[@Mr357]

Take a drink every time Scotty slaps that magnet onto the filter.

[@teardowndan5364]

You do have some normal wear in bearings, cylinders and other parts which could create some ferromagnetic particles. Most of those would come from the initial break-in period where the engine is basically self-machining itself to final specs and is the reason why the first oil change or two are much earlier than the regular interval. After that, there really shouldn't be enough metal coming out of the engine for filters to clog between regular oil changes.

[@justinp8946]

Teardown Dan true, when I change my oil, I have tiny glitter not much but it’s hard to see and when I do oil changes on other vehicles, same thing too. Oil doesn’t stop all the Wear happing

[@jamesvw769]

Thats how it use to be. New cars no longer require a short cycle oil change when new. Nor do they use break in oil any longer.

[@southjerseysound7340]

I always thought they're pointless but one of the best marine engine builders highly recommends them and he doesnt sell them.

[@southjerseysound7340]

The whole point was he believes in them ;-) He sells $80-100k+ race engines and is one of the few successful builders that has stood the test of time. He actually recommends them for his engines.

[@edwincorreajr]

Can you review magnetic oil pan drain plugs instead

[@PrimalMiltos]

I have the one that wraps around the spin on filter and everytime I cut the filter open at 5000 miles intervals I always find fine magnetized sludge. So magnets trap that passes my Mobil1 filter. On trannys and rear axles magnets are a must you may find fine metal shavings especially in the breakin period.

[@kirara4953]

Scotty you're reaching 1M subscribers!

[@jamcastillo01]

Kiraro The Kitsune Much hype

[@kirara4953]

Po Tato Well, he is not too old to do burnouts and drive Mustangs so he should be able to.

[@kirara4953]

JAMCastillo1 Hype!!

[@ericherrmann3799]

so why do they put large magnets in trans. pans near the Filter , magnets in rear and frt. differentials power steering pumps etc. every time I clean a magnet off and reinstall I sure know that really works, cheap and easy I love the magnets Scotty

[@andriusfink]

What about oil drain plug magnets?

[@babranson1]

My Kubota’s filters come with magnetic rings in the top of the hydrostatic filters. The hydraulic filter and the engine filter do not have them. If I remember right the hydraulic filter is on the suction side and the hydrostatic filter is on the pressure side. Both use the same oil. The used rings make a nice smiley face on the wall of my shop

[@gliddy6282]

Scotty...you are awesome. You are saving hard working people, money, one car at a time.

[@myvtec79]

That's what I like about scotty, his no bullshit aproach, straight to the point and consistent common sense. keep it up man.👍

[@mmpiforall5913]

Sorry, Scotty never tried it to see what works and what does not. See the results I got: FILTERMAG vs HOMEBREW app.box.com/s/uxvu8dmscf5wcgftutdm0ejqwgn86tw7

[@linvol20]

Ill have to disagree with scotty here, I just did my first oil change with a magnet plug and it had particles on it too small for my filter.

[@indridcold8433]

Also remember, ignore the manufacturer recommended oil change interval. That oil change interval has you change the oil when the oil pump is left churning mud. Every 3000 to 5000 miles is when you change your oil.

[@Doraemon-wq2vs]

how about magnatic drain bolt?

[@utkarshadhikari5525]

pikachu mouse it's good and it works

[@willjimenez3394]

The main purpose of that is when you unscrew it and let the oil drain, you can wipe it clean and stick it on the pan (somewhere visible to you) so you don't lose it. And it's ready to go when you're done replacing the filter.

[@Shwalker07]

For the last 10 years, that has been the best investment on my stock Toyota motor. It helps pick up any metal before it gets sucked into the oil pump then to the oil filter housing. Most stock GM vehicles from the 90's to 2000'ish had magnetic oil drain plugs installed right off the assembly line new.

[@zzman5306]

Their magnetic strength is no where near a filter magnet

[@Pssnmeoff]

Kilmer's Snake Oil was started where I'm from, Binghamton, NY. Cool that was like a little Easter egg. I used to walk by the "Kilmer" building all the time.

[@doit_vehicles]

Why on some transmission pans there is a small magnet at the bottom ?

[@tomasnokechtesledger1786]

Because it really helps to extend parts life.

[@mescko]

You will notice that the magnet is on the inside or the pan. Placing the magnet on the outside of a steel pan is useless because the ferrous pan blocks the magnet's field, making it impossible to attract anything on the inside. Same problem with the filter canister. Now, if the pan were aluminum, the field would go through the pan. Of course, you'd have to glue the magnet on...

[@speedtech9877]

mescko take a magnet let it stick to a piece of metal then place a nail on the other side you will see the nail attaches to the metal just fine,making the magnetic field possible not useless,of course you already this right!

[@5roundsrapid263]

Transmission fluid is changed a lot less often than engine oil. Plus, some transmissions don’t even have filters.

[@ralfie8801]

Transmissions are different from engines in that they use Metallic parts as part of the friction material. They just naturally have more fine metal floating around in the fluid. It collects on that magnet as a fine gray metal paste.

[@AutoFixYT]

If people want magnetic oil... things.... they should just buy a magnetic oil drain plug, at least that sits at the bottom of the pan where all the dirt collects. But as you said, if you change the oil AND filter often, it's fine. I pulled the pan on my 300k mile corolla several months ago (290k back then) for the first time, And it looked really good. A little stained and some old oil in there but other than that, my 3000 mile oil changes have kept it running like a dream!

[@Nanogrip]

Thanks Scotty as always. I'm still going to use my magnet filter because...well I paid for it so it stays hehe. You're getting close to 1 million subs!

[@fastdude2002]

If you cut open the oil filter and there is fine pieces of metal stuck to where you had the magnet it would not matter if you did not have the magnet because the filter itself would trap the metal. That's the whole point of an oil filter, that's what it does. Magnets are a gimmic. As the old saying goes, a fool and his money are soon parted.

[@grassroot011]

but there are limits to how small the filters will stop particles, the magnets can and will, grab those.

[@fwh79FOXR6]

grassroot011: You are exactly right. Several OEMs use magnets, because they work. Don't mind Ryan Tuck, he is busy thinking about the exit holes he is constantly lusting for.

[@jeffstangl1471]

JUST watched a video saying a magnet was the most important part of an oil change, common sense and seeing the cross section of a quality filter tells the truth. Thanks

[@Kungpl0w]

@scotty you should do used car reviews on cars that you think people should buy doesn't have to be new just has to be a reliable good car

[@scottykilmer]

good idea!

[@stephenmaurer7008]

Or cars that come into your shop frequently for repairs.

[@mikemorales1725]

Scotty should feature good used cars for sale in his area to demonstrate what to llok for in a good, used car.

[@kirstysinclair9021]

baseer1992 there wouldn’t be any cars left to buy after mr everything in the world is shit has finished .

[@kirstysinclair9021]

Scotty Kilmer so long as it’s not a turbo , a v6 or any other car on the road . You always sound Mr negative and mr negative has a list of 2 I should imagine .

[@gusgiesel]

It is true that your vehicle will probably run just as long (and as well) with or without putting magnets on your oil filter canister. But I would like to share a few things about oil filter magnets: First, I have run magnetic oil drain plugs for decades and there has always been a small bit of black goop built up on the drain plug magnet. This is to be expected, and catching this goop it is the reason why a magnetic drain plug is a good idea. However, when I began running magnets on the outside of my oil filter canisters, the black goop disappeared from the magnetic drain plugs. I mean it completely disappeared and there was nothing at all on the drain plug magnet. Goop gone. Also, many internet videos show the inside of a used oil filter canister that has been run with magnets on the outside, and you can see the pattern of magnetic particles on the inside of the can. This also confirms my first point: the filter magnets are actually catching *fine ferrous particles that would have ended up in my oil pan.* This means that the filter was not catching some of the iron particles! Pay attention Scotty! Finally, by using filter magnets and catching these particles inside the filter canister, you are keeping some of these particles out of the oil filter media and therefore prolonging the service life of your oil filter. So your oil filter can be used for more miles, and/or a longer period of time.

[@AwakeDude911]

the 60's ...I bet YOUNG scotty was smoking more than tail pipe exhausts back then ...............

[@footprint_594]

Geez, he's not THAT old..

[@alasdair4161]

Spot on Scotty, also, the metal housing shields the magnetism as a keeper, therefore nothing will stick inside anyway, open it up and try it with a screwdriver, virtually no attraction. But.. where a magnet is good, but needs to be inside to work, is in the gearbox, especially of a manual transmission, as the synchro rings chip and wear down, the contaminates causes more bearing wear through oil contamination in a long service interval situation. The baulk rings and synchro's are magnetic steel, so it works well.

[@mediumgrey8674]

Numerous videos of people cutting open oil filters and finding powdery metal stuck to the magnets including me.. I believe they work because I can see it with my eyes. So I'll keep my magnets.

[@bait28]

because the magnets keep it from going into the filter material, it's like using a condom while she's on the pill, then saying she didn't get pregnant because of the condom

[@leonlotter7427]

According to my understanding first time i hear of this product, i think it's convenient why of something inside the engine breaks the oil filter takes care of it for you not sucking but it's being magnified all loose piece's to the filter that i think is quite nice!

[@markarmstrong3394]

Scotty in the movie Days of Thunder Robert Duvall wore a blue cap that said Purolator if I remember correctly

[@misters2837]

He did!

[@tomasnokechtesledger1786]

Bitog calls it Tearolators

[@linctexpilot8337]

Bob Is The Oil Guy... search for it

[@anonymike8280]

I like juvenile malapropisms. P*k-olator. Although, their oil filters are pretty good. I used their 10,000 mile filter on a car I had where the filter was hard to get to. Changed the oil itself every three months and the filter once a year. Until the transmission started to go out. State bought it in the cash-for-clunkers program.

[@Delfschnizzles]

Magnets are helping in some cases, like motorbikes old mini coopers etc. Where the gearbox is inside the engine block. Metal shavings will be picked up end kept aside in de filter element, metal shavings are sharp and filter material made of paper like material. Your oil pressure can push the metal shavings straight thru the paper. That is why most modern cars have magnet tipped drain plugs, metal particals that did not get stuck into the webbing of the filter will flow back to the oil pump everytime you stop the engine. Magnets on fuel lines is a different story, this system is called a debug system and is even used by the biggest engines on board sea going ships. Fuel will be bunkered into big bunker tanks, pumped to setteling tanks were it will be kept for several days, big seperators are running the clean out the last big particals and water, the "clean" fuel will than by pumped into the debug system wich leads directly to the fuel service day tanks, going the all the engines. This debug filter is killing bacteria and other stuff left in the fuel which can contaminate the duplex filters,fuel pumps and injectors on the engines.

[@TheWizechatmgr]

What's your take on the bar magnets VW puts in the transmission oil pan? I've seen them collect some fine grit over time... Would imagine most of the bearing surfaces, etc are also non-ferrous.

[@BlazenWinchester]

cheap insurance using a magnet.

[@Ogre302]

I have someone in the family who does magic shows and he is also a hot rodder having this home made street rod "diamond T" (Looks to me more like a wooden UPS truck to me) and he does his show with a snake oil salesman theme as the back opens up into a stage. He collects snake oil stuff to decorate his rig with!

[@MrLegit-mq9ki]

You should make a video on Chinese products dirt bikes and scooters and tell if it's worth getting them. Good idea huh

[@scottykilmer]

good idea, thanks!

[@VladThanatos]

You could start with a BMW Z3. Or maybe any Subaru.

[@magoxide7777]

Haha we use to run joialing dirt bikes on the dairy farm. They where a replica of the honda xr. They where good on the fact they where super cheap. You could buy about three of them for the price of an xr. Farm bikes get abused anyway, so it was no big deal if you only got a couple seasons out of them.

[@rossbrumby1957]

I bought a yamoto 125 new in. 2007. Road registerable with lifan honda copy motor- 2000 km started knocking so had to rebore and replace piston with one that was more round! From assembly the crankcase breather was pinched between the engine and frame so it blew a crank seal out and dribbled oil til the rebore job. Sold it as soon as it was fixed. Now I own 2 XL250s, 1 XL500s, and a 1980 DT125 all together bought for less than the cost of the crap chinese bike.(theyre all good runners too)

[@ralphfalstin5337]

Mr. Legit common sense tells me HELL NO!! No matter what the employees say(Honda clone).

[@danielk7111]

As an engine builder, there might be something to a magnet in the drain plug or on the pan (I’d put it above the drain hole if possible so when you remove the magnet, gravity may help the iron drain out). Why? The engine driven oil pump draws the oil from the pan, unfiltered. I can visually see wear occurring there. Especially vulnerable would be VANE style pumps like in my Jeep’s 3.6 Pentastar. If I can catch some of that while it’s still in suspension before settling and possibly getting stuck in the bottom of the pan, even after an oil change, why not? I picked up an inexpensive but quality (neodymium magnet rated over 300° operating temp) magnetic drain plug to “help”. Of course, I’m also the guy who wants to find 1hp on a 700 hp engine within the rules too. 🤷🏻‍♂️

[@iMotoTactic00L]

Next--> Why not to buy a oil plug magnets?!..lol..

[@ballpython727]

I wish I could post a photo in comments. I use a single filtermag on the oil filter of my jeep. I cut it open every oil change I do just to check the health of the engine. It does work!

[@javierg3671]

Hey Scotty, if you have never tested the theory why are u against it, I tested it found gray superfine metal dust after cutting the oil filter open and this is on a 2015 Lexus also on my 05 cadillac that had some also , take the the challenge do the same couldn't hurt right , if those fine particles hit the piston wall they would scratch it so it couldn't hurt on top of the regular oil change

[@melodicdreamer72]

Did you compare that to a oil filter run without a magnet attached? Particle filtration is particle filtration. Considering the rate of oil flowing through the filter, a magnet would have to be ridiculously powerful to stop all of the pieces from being sent on its way if the filter media happened to be compromised. ...The part about wouldn't hurt? What affect is the magnet going to have on the bypass valve? I'll just stick with a standard oil filter myself.

[@davidanthony8290]

The filter will remove grey sludge. This is normal engine wear.

[@bait28]

if it made such a big difference, oil filter companies would be building magnets into the filters...

[@jonathanmetelski7428]

I'd just like to point out something I noticed. I'm a mechanic and my boss has several new cars one of which is a 2018 expedition first oil change at 1200 miles! When I removed the drain plug I put the magnetic end of my pocket screwdriver in the oil still golden in color in a matter of 5 seconds I could notice the incredibly small metallic flake. Probably bearings now I have never stuck a magnet on an oil filter but I'm concedering trying it on my car and cutting open 2 oil filters with a pipe cutter to not make any metal fragments and comparing the oil as well as sending in 2 oil samples one with a magnetized filter one with out both at 2000 miles with the same oil and filter. You may want to try the same exparament on your channel to broadcast the results to a larger population.

[@SteveAubrey1762]

I'm glad you made this video. I've been putting magnets on my oil filter and oil pan for years b/c a friend told me all the stuff you just dispelled! Thanks Scotty!

[@shaneintegra]

Scotty was wrong... He's been pushing out a lot of uneducated videos based solely on what he thinks to make more money. It's sad really. Ask someone who analyzes engine oil for a living and you'll find that Scotty's "this is what I think" theory is invalid

[@SteveAubrey1762]

@@shaneintegra Ok, Im glad you posted this. Yknow, even if Scotty is right, it won't hurt putting magnets on the oil filter & pan.

[@gtdodgeviper]

2:06 thats like closing the barn door after the horses have already run away. Thats so funny but so true.

[@bodgitandleggitgarage]

Who needs oil if you don't put oil in your engine you won't have to worry🤣🤣🤣🤣🤣🤣 no magnet no oil sorted🤣🤣🤣🤣🤣🤣

[@ilikeboost4764]

bodgit and leggit garage exactly

[@cafenightster4548]

Don't forget, loctite or crossthreaded, Tight is tight.

[@EXOVCDS]

bodgit and leggit garage What are you doing here?

[@pricey0986ify]

True, no magnet, no oil....... No engine no car = no problems

[@deborahcumberbatch8431]

bodgit and leggit garage nnir5thkuvggtgvgtgvtfcis 😙

[@surplussean3364]

European cars have magnets in the oil pans that collect metal when the oil passes over them. Also, many drain plugs on older cars are magnetic to collect metal on the plug tip

[@nw122]

Thanks Scotty. You're a blessing to the society.

[@scottykilmer]

Thanks for the support 👍

[@squarebodychevyoverhauls6982]

You're right Scotty . If you want an engine to last longer change your engine oil & filter when recommended . But for the low cost of a magnet on the filter it's going to help attract and trap some of the metal particles in the oil stream . This will help to take some of the load off the filter material so it can do its job better . With the cost of replacing an engine , a cheap magnet thats easy to install sounds reasonable to me , cause you can never believe what a manufacture claims will filter out to that level of microns

[@DuBstep115]

Yeah like it costs $5 bucks and lasts forever, so why not use a magnet is the question you should be asking yourself.

[@moonlighter6]

Ok, I admit I do have a magnetic oil drain plug. At least I'll never lose it.

[@utkarshadhikari5525]

moonlighter6 that is a good thing TBH. There is a long explaination to that but keep it

[@mmpiforall5913]

Check out the PDF with on the results done by a pal with my pics! FILTERMAG vs HOMEBREW app.box.com/s/uxvu8dmscf5wcgftutdm0ejqwgn86tw7

[@Shwalker07]

Me to. For the last 10 years, that has been the best investment on my stock Toyota motor. It helps pick up any metal before it gets sucked into the oil pump then to the oil filter housing. Most stock GM vehicles from the 90's to 2000'ish had magnetic oil drain plugs installed right off the assembly line new.

[@underwaterdick]

The other bonus about metal plugs is that you can easily see when you do have an engine issue... If you have large metallic particles, there is an issue. Aircraft use them in nearly all gearboxes, on helicopters it can save lives.

[@fifteenbyfive]

It would seem to make more sense to have a magnetic plug on a transmission or differential which don't have a filter like the motor.

[@briand.1694]

Magnets in/on oil-filters are just another thing to make people feel all warm and fuzzy about doing MORE to protect their cars engine from inevitable wear. Like Scotty says, just change your oil and filter regularly. That is the single best thing you can do for it.

[@JonnyDIY]

*Haha Id buy Scotty's Snake Oil any day of the week!* 🐍🛢️

[@Danbotology]

And a magnetic snake oil filter to go with it!