K&N Filters - Do oiled air filters damage MAF sensors? Testing & Results

Testing and research carried out by K&N to determine if the oil from their air filters can be pulled off the filter.
And if so, would this oil cause a MAF sensor to fail.
►SUBSCRIBE / @drivetunemedia
In our experience MAF sensors generally do not develop problems. It is a very simple device (it has no moving parts) which cannot be damaged by oil.
The wire element is usually protected from the air stream ie air entering the engine does not normally have a straight shot at the wire as it is usually encased in a plastic case to protect it. If the air entering the engine does not have a direct shot at the MAF wire, it is hard for me to see the wire being hit by oil coming off an air filter, IF oil is even coming off the air filter in the first place.
However dirt & dust build up on the MAF wire can be a real problem, especially on higher mileage cars. If there is a layer of dirt covering the wire in the MAF sensor, the wire will be insulated from the air entering the engine. The will mean the temperature of the wire will be less effected by the air stream.
If the wire in the MAF sensor is not getting an accurate picture of the air, this can cause the engine to run at less than optimum.
In extreme cases it may even cause a check engine light.
However, most MAF sensors can usually be cleaned with basic hand tools, some Acetone /Isopropyl alcohol and cotton buds. This can be carried out by most people without any specialist knowledge.
In short, can oil come of a K&N air filter? Unlikely.
If oil did come off an air filter, could the oil cover the wire in the MAF sensor? Probably not
If some oil did hit the wire in the MAF sensor would this damage the MAF sensor? Extremely unlikely.
0:00 K&N history
0:44 Intro to testing
1:23 Customer in middle on warranty issue
1:50 MAF sensor testing
2:15 Was MAF contaminated?
2:26 Forensic testing
2:58 Forensic results
3:07 Testing returned MAF vs new MAF
3:35 MAF sensor types
4:10 Overall test results
6:05 Results summary
7:00 Understanding what happened with returned MAF sensors
7:50 Represent customers
9:00 What will make K&N oil to leave filter
9:33 Test protocols
10:08 Wind speed through air filter
11:20 Filtration testing
12:29 Test MAF after submerged in K&N oil
13:30 Expose MAF to dust
14:15 What contaminates MAF sensors?
15:40 MAF contamination from PCV
16:13 MAF burn-off cycles

[@GTOGregory]

It is good to hear K&N has a consumer relations department that can intervene when there is a dealership issue.

[@richb.4374]

I never had any issues using K&N filters and cold air kits. I put one on my truck and it works great. Don't over oil the filter element and make sure your crankcase ventilation system isn't dumping too much oil into your intake.

[@ashleymassaro1063]

I have a K&N cold air intake in my 2015 ford expedition and I'm very satisfied with it. It came with all of the parts and was extremely easy to install. I even noticed an increase in horsepower as they guaranteed as advertised. Great company👍👍👍

[@MrZarono]

You "noticed" an increase in horsepower? Show the dyno results. Saying you "noticed" a HP increase is BS.

[@PS3Dragonblood]

BigDk DPS Go check for yourself. That shit is just lazy and annoying. You are on KZbin and you ask someone else to do research for you. Really! Look up G37 drop in air filter dyno tested. 14 Hp increase. People should learn before you speak.

[@strongherd]

This is the most BS comment I've read. Idiot!

[@3guavamidnit]

Can I asl how long have you has it on? Do you still have it on?

[@georgefelix7906]

Thanks guys , for the very instructive video

[@jumpercable20]

I've been using K&N filters on over a half dozen of my vehicles since 1984, never had the first problem with them.

[@neilf250]

My new RAM: I installed a K & N filter. All seemed good then the day before a big trip on comes the engine light and I start getting crazy temp readings. It is the only modification I have performed. I have now removed the filter and cleaned the MAF sensor. The light is now off and only time will tell if my decision to remove the K & N was correct diagnosis.

[@zipper978]

130,000 on my car with k&n since day one. Never had a problem. Use maf sensor cleaner if you have to not a big deal. That sensor should be cleaned every once in awhile anyway.

[@270wsm140gr]

tried this on my 12 tacoma,before Install, I clean MAF and throttle body at oil change then about 16k later I decided to clean MAF sensor and throttle body, it was black?? I've clean MAF sensor every oil changes but this time I didn't for 16k ,don't know if all that blk stuff is the oil on K&N filter?I got the one that drops right in to OEM filter housing I'm going back to factory filters :(

[@ru2yaz33]

Bought K&N filter years ago, after 6,000 miles I noticed a slight film from the filter to the throttle body. My truck still ran, but there was now a slight film. My mechanic cleaned the MAS and all parts from filter to throttle body, and he seen this before with K&N filters. Most people don't notice a problem because and trade in their vehicles every other year. I've seen a forest fire truck where the fine ash particles made it pass the K&N filter glue to the entire surfaces. Rather than talk about it throughout the video show your testing equipment at work.

[@stanhamilton6031]

A wonderful presentation by K&N to defend themselves against accusations that their highly engineered products can cause MAF sensor failures. They make great filters and I will continue to use them over all others in the market. I think the whole issue is the mechanics involved pointing the finger at K&N instead of the MAF sensor supplier.

[@jasonmcnamara2079]

@Sphinctoro lol, snap.

[@ddm62571]

If you watch some of the youtubers that show how to oil the filter many of them OVER OIL it by soaking both sides of the filter. That's why you hear some experience issues.

[@aussietaipan8700]

Read the cleaning instructions properly. Some people think more oil is better, others say less is better. The trick with K&N is to let the oil soak in from the fresh air side for 1 hour at 20C then re apply oil to the less covered areas again from the fresh air side. I've been using them for years now all in MAF vehicles and all with ultra clean air boxes and no MAF issues.

[@alfonsotejeda6931]

Aussie Taipan well done explained. If you follow the vendor instructions and don’t over oiled you will reach the result that vendor says. Most of people does not follow so why the people complain?

[@Sandy-oy2lr]

I just ordered one for my C6Z. The OE Donaldson unit the dealer wants over $200. And I can't get the correct AC Delco unit from any of the discount centers. I've used K&N before and never experienced a MAF issue due to contamination. However, I do like to hedge my bets. So I also purchased CRC's MAF cleaner....I clean the TB once a year, anyway. No extra skin to clean the MAF.

[@jimdailey1018]

I have used them since the 70's and have never had a problem, cars, gas trucks, diesel trucks, motorcycles.

[@TubolMotoadventures]

did you also oil the filter after cleaning?

[@urbanpeltier1622]

@@TubolMotoadventures if he's been using them that long he would have to. And be a master at oiling them.

[@jshapiro34]

I’m on 4 of my personal vehicles with a air filter and 2 with cold air k&n my family is well over 12 vehicles all using k&n products and zero issues.

[@robertholsopple9451]

138000 miles on my cavalier z24 using a k&n short ram intake. No issues. I love my k&n filters. I use them in my Yamaha fz6r 29000 miles no issues. K&n oil filters as well.

[@Sandwich420]

I've always used K&N and never had an issue. Never changed a sensor for prematurely failing.

[@jumpercable20]

People always look for something or someone to place blame whenever there's a failure. If people worried about important things in life instead a dirty air filter just think how better off the world would be?

[@MikeEchoNovember]

I had K@N filter on my 04 3.0L Ranger Edge and finally went back to stock Motocraft paper filter because it was making engine idle between 1 @ 1.5K RPM at random times! When I went back to paper it idles perfectly at 650 RPM! I even used MAF cleaner but it didn't help? Just my opinion but think your vehicle's computer is dialed in for a stock filter and if you want to add K@N, you'd have to get your car dynod and chiped for increased airflow?

[@Lsines209]

check the breather tube for blowby it can suck oil in from there

[@notamotorbikemechanic]

Very interesting video, some of my subscribers have questioned the safety of K&N filter. Personally I’ve never had an issue with them.

[@goslug]

I used K&N filter on my 2000 Lexus RX300 early on and eventually I've to replace the MAF. I think it has to do w/ the oil so I stay away from oil filter.

[@greatreset3]

So if there's oil on the surfaces of the intake system, (which I've never seen any that dont have some amount of oil), unless you disconnect all other inlets to the intake, (PCV which is designed to route crankcase Oil Vapor to the intake), how would you know the oil came from the filter?

[@virgilgray]

Unbelievable you would even ask

[@krazyj1957]

I've put K&N air filters in our last four cars with no problems from sensors.

[@scottmahoney3147]

Yep, I've had 1 before. No issues at all.

[@THX2012]

Quality? What about leaks from the welded nut on K&N oil filters?

[@nickt1187]

I ran a K-N in my Ford Crown Vic interceptor (4.6 V-8). I also have one in My Ford Explorers (5.0 V-8) NEVER had an issue with any MAF or anything else. I had a blue paper towel stuck to the underside of the filter and never new it until I went to clean the filter !!

[@jumpercable20]

One of the main problems is that people soak the filter with oil. All it takes is a light coat that shows that the filter element has a red tint to it. It's funny, I've known engineers that can't follow simple instructions, then they blame the filter because they had it dripping with oil when they installed it.

[@faithwalker2287]

I have 4 K&N filters. 2 for my son’s Jeep and 2 for my Chrysler cruiser so I can immediately put one in and be able to clean and recharge one properly for the next change. Maybe excessive but I’d rather not have to wait for days colder months for it to dry indoors when the vehicles are needed.

[@stcrfan]

I have one in my 2012 Camaro Supersport. The Engine light came on. Took it to the dealership. They said that there was a problem with the mass air sensor. They changed the air filter to a factory air filter.

[@silentvoiceinthedark5665]

Been using them for about 26 years now, had them on multiple cars never had an issue

[@JDew79]

I think many people over oil them and not let it set before use...

[@roadreg1820]

I made this mistake and indeed had to change my MAF. After this, I oiled it correctly and since then have not had a single issue. I put 60,000 miles on that new MAF and the car is still running like a dream.

[@7071t6]

So 4 sensor were clean yet failed WHY ? out of the 23 ? silicone too much oil or used the wrong oil if KN oil does not have silicone in it ?

[@joec2174]

Are your filters pre oiled from the factory ?

[@f86fman]

I've had a K&N filter in my 1995 C4 Corvette for 22 years now. I have clean MAF and inside of air intake manifold shows no sticky oil residue. I do have a little oil residue but it is not from the filter. Engine compression is about the same as when the engine was first broken in. Of course I clean my K&N per instructions and do not "soak" the filter with the oil spray medium until point of leakage. This is the key: follow mfg. instructions!!

[@markymarknj]

As they used to say in the Navy, when all else fails, follow directions!

[@jda8176]

I've owned about 6 different cars all of which I had a K&N filter, all with a maf sensor and none of them had any problems with a malfunctioning maf, and most of these cars I put about 30000 miles on.

[@cooperjohnson1709]

jda8176 most of the people complaining here have the kn intake system which could throw a cel unless they get a tune. I only have the filter and i clean my maf and throttle body and kn filter every year. I dont over oil it at all.

[@CassidiCollins123]

jda8176 was is the it I

[@JWL-UK]

First ever K&N filter fitted to my Audi TT and after a few weeks engine would judder when coming off the gas at lower RPM. Took the MAF sensor out to clean it and found a thin layer of oil all over the sensor. Cleaned it well and car has been fine since. Coincidence?

[@xynstav]

Next time get a dry filter

[@ogbrmusic]

I was knee-deep in filter review and research and ended up choosing a k&n When all was said and done because of the performance in the 0 to 60 benchmarks even though the wix filter performed usually on par in that regard but I was concerned because I heard the oil in the filters would screw up sensors along the air path. I asked an employee at the auto parts store near me how often people came in complaining and they told me only around every four years or so so I felt pretty secure that I would not be one of them and that the chances would be slim. Well long story short, I think most of the people that did not complain where are the types that just didn’t notice the RPM changes.My car no revs just above 1000 RPMs at idle and is nowhere near as stable as before I started running this filter so I would say that the results are in. Now if K&n is willing to replace my sensorsI may change my mind

[@ogbrmusic]

Horrible in the heat!

[@duanegroomes2564]

300,000 miles on my K&N FILTER ,V8 TOYOTA TUNDRA.

[@bladder1010]

... and aside from the constant backfiring, stalling, hesitation and check engine lights -- it runs perfectly fine.

[@bc_usa]

@@bladder1010 Says the guy that drives a Ford..LOL

[@ddm62571]

@@bladder1010 Those are vehicle issue's not filter issue's!

[@bladder1010]

@@ddm62571 I guess if you call the fact that someone stuck a K&N filter on the vehicle a vehicle issue, then, yes!

[@bluemeanie6395]

I just cleaned loads of oily gunk off my MAF sensor. Was only dirty on the filter side which is hard to see through the mesh, so it took me ages to diagnose the cause of terrible engine performance. The K&N Filter oil was absolutely responsible for fouling up my sensor over many years. They are good filters but you must clean your MAF sensor once a year if you use K&N.

[@kucharz1986]

What do you use to clean your MAF sensor?

[@yotruu]

kucharz1986 they sell special cleaner for it. Maf sensor cleaner

[@ynotjf]

Running K&N in my Duramax for over 10 years, no MAS issues BUT to say oil doesn’t come off the filter under any normal condition is BS! Oil drops off the filter and coats the inside of the air box and oil film travels up the air intake system and a very light film of oil coats the inside walls of the intake and sensors. For performance it’s K&N all the way but for maximum clean air to the turbo, OEM paper filters are hard to beat

[@marcs4091]

I never had a problem but I go lite on the oil and let it dry for at least an hour and a half.

[@jamielindsay1929]

Ran k&n on bmw 330cd, ran horribly, engine management came on, wouldn’t boost right at all. Swapped it back out for a new OEM replacement, i think it was a MANN filter. Car runs a lot better than it did with k&n but still not 100%. I’m about to change the mass air flow sensor and see if this helps at all. I have lost top end power.

[@DriveTuneMedia]

Before changing the MAF (which are usually big money) I'd definitely make sure its clean kzbin.info/www/bejne/qImnoGCBidx9jdU

[@waxsantiago339]

Had my powertrain light up when I used K&N. I have a 2.2 liter ford ranger XLT diesel. If you want to get in touch just let me know. I'm about to go back to OEM now.

[@MrEqp123]

been using k&n since 1995 never had a problem, never found oil in any of my intake pipe, but yes oil after throttle body due to blow by gas and contaminants from the pcv.... thats why i have a catch cann cmon now people.

[@MsSomeonenew]

K&N researches their own product and finds it flawless... what a bloody surprise. Every mechanic on the planet has seen oiled up air filters coat the intake system, it's not something that happens over night, it happens over a large period of time and it is an area no one ever checks.

[@DriveTuneMedia]

+MsSomeonenew Hi. About oil in the intake system. I think you will find this on 99.9% of cars due to the crankcase venting into the intake system. Nothing to do with the air filter.

[@donrowe7194]

Michael 100% correct, just an excuse k&n uses to defend their products that damage maf sensors. i have a subaru wrx and my maf is placed way out near the end of the air intake pipe. i also have a air oil seperator on my wrx...been there since i put it on within a week of owning the car...so zero chance of engine oil contaminating my maf. the only cause of my maf failure was running a k&n air filter. it was proven to me by more than 1 ase certified subaru mechanic.

[@donrowe7194]

but k&n oil filters are damn near the best constructed oil filter i have ever seen. cut a bunch of various oil filters apart just to see how and why they work. k&n has a top teir constructed oil filter. for less than $15 it is way sturdier bulit than most $20+ oil filters

[@ryandronsfield6177]

if your getting oil on the other side of the filter that's from the filter it's self I have seen oil in the intake system with stock replacement filter so either it's just the nater of the environment or you have over oiled your filter other wise I have never seen any problems arise from using a K&N filter ever and I suse them in all my vehicles

[@Stalkerx13]

Don Rowe Try Purulator at any price, I promise you it will out perform the K&N with ease. Even their cheapest Oil Filter is of higher quality than the K&N

[@xbluewolfy1741]

No they don't the only times people have issues is when they drench the filter in oil, stick it back on and go driving within an hour lol. Light oil, couple of hours to dry then stick it back on and you'll have no issues.

[@vincentyap3188]

the oil act like our ear gar in our ears, so it can trap all the dust from entering, you can still listen with or without ear gar

[@jtaylor2563]

Been running K&N filters for decades aleast 20 different cars including my BMW I drive now! Never had an issue ever! Only the fool who oiled it too much and not letting sit for a hour and wiping down before installing is the problem! Need to check your PCV valve for the issues.

[@bobg3221]

Hell yeah! Brother 🤙🏻

[@atlas3863]

their great filters i’ve been using them for over 20 years on car’s,truck’s and motorcycles with no issues, but when I clean them I’ll let them dry thoroughly overnight. if need be I’ll reinstall the old paper filter till the next day ensure the filter is bone dry. then lightly oil the incoming air side that’s it. the oil will pull itself through the filter. I think the problem is people spray too much oil on a wet filter and “poof” you have a mess. either way the sensors can be cleaned using “mass airflow sensor cleaner” if that doesn’t solve the problem then the sensor was on its way out.

[@lulmoewiththegimpyleg6815]

What about g37 maf sensor since there right on the intakes

[@dannyroberts8217]

I keep getting a lean running fault when temps are below 50 degrees with the K&N intake kit on a 2002 F-150. I clear the fault and pass the Texas inspection for the last six years. Why does everything work fine until the air temp drops below 50 degrees? In Houston,, below 50 degrees is a BLIZZARD, so I just keep clearing the fault and drive on. Nobody I know with factory air filter systems has this problems, several with K&N have got rid of their K&N because of this. I'm keeping mine!!! 19 MPG average with a crew cab 5.4 engine, over 220K. Never had a problem with OEM intake. But I NEVER got a 19 mpg average. Been driving the same route to work for years and same traffic in Houston. I'm keeping the 5.4 Triton and K&N for now. K&N=Not perfect,, but I can get around it!

[@DriveTuneMedia]

Because it happens below a certain temperature, Id say it is because the engine is getting too much air (according to the ECU). Lean running fault would back this up and also explain the good fuel economy. Im not sure if it is something to worry about. Could be worth running a wideband on the car just to check it is not running too lean, like 16.5:1+

[@jasonmcnamara2079]

@@DriveTuneMedia colder the air the more dense it is hence more air jammed into same space.

[@nikiD1982]

Hi all, i have a european focus 1.6 tdci 2010 with 109 bhp. Today i decided to change my stock air filter with k&n in original box filter. I started the car and after 2 minutes drive i noticed low boost on my gauge, normal was 1.1 bar and now after the kn filter it was struggling to do 0.7bar. Driving in 3rd i put my foot down and boost never passed 0.5 bar and went into limp mode. I shut down the engine, restarted and changed to stock filter back. No problem, the boost is back to 1.1and back to normal. The kn was at fault but can't figure out why. As i would like to go with it but not if it hurts my engine. If somebody had a similar issue please advise

[@edyacheraii4279]

nikiD1982 sounds like to much oil in the filter for it to let air get buy

[@edyacheraii4279]

Oops get by stupid spell ck

[@Ghryst]

6:45 - question .. what percentage of the people who go to the trouble of changing to a high flow air filter of any type, subject their vehicles to "normal operating conditions"?

[@calimangrower1590]

Damn Momos spray the filter lightly omg lol

[@JHunt6352]

This sounds may stupid but it's a true story of mine.. I once owned 19?? Ford Ranger.. One of many oil change services, I took the truck to Jiffy Lube and the guy suggested me that I should change the air filter because it was getting dirty and I said "okay".. Three months later, I checked the air filter and I found out it was not a right air filter for the truck because it was right size in width but not in length.. The guy at Jiffy Lube cut off the length to fit the filter in the box and he didn't even cut it to the right length.. it was a good an inch opening.. So, I threw away that air filter and I didn't put any air filter since.. The car had 30,000 miles on it at that time.. I drove the truck to 127,000 miles and sold it.. The truck had no problem since the day I sold it.. Of course, I put a new air filter in the truck before I sold it to one of my dearest friend 😁😁😁.. I didn't hear any complaints form him up until today.. I understand if you don't want to be my friend..

[@riccccccardo]

I think I’ll avoid and 3rd party filters in future on my mk 4 golf I had to change air mass sensor twice and I had a brand new k and n cone on it which I cleaned routinely as manufacture stated. Plus my current Audi you have to take apart half engine bay to get to the filter box nightmare.

[@cooperjohnson1709]

riccccccardo get a tune to avoid replacing the maf sensor. You must have a kn air intake.

[@edmunek]

Used different cars for several years without any issues at all. In my newest one, after using it for 2 years (without any issues) placed the K&N air filter. Week later MAF / MAP sensors are going crazy and throwing errors. Checked inlets, pipes, sensors, all good. So sorry K&N but I wouldn't be using air filters which are causing several errors in my car. Each time I was getting an error, my turbo was completely off because ECU will protect it from any damage. I have screenshot each time it happened, investigated very carefully what seems to be a problem and sadly it is the K&N filter to blame....

[@gerrymcerlean8432]

So the K&N guys say their filters are great. What a surprise.

[@HypocriticYT]

I had a 1950's car and they all have oil bath air filters, no problem. Paper filters were devised to boost sales of expendable parts.

[@Norg89]

Oh did that car have a MAF?

[@loktom4068]

1950 cars has no electronic sensors. They were cruel and simple. Try it on a 2010 Mustang - 2017 Corvette. Then you get your paid answer. Granted some products were excellent in the past for older cars. I recently ran into warranty problem with my Michelin tires due to cracks and dry rots by using tire shine products ( Amor All) that were well proven & popular in the past. The tire dealer and Michelin gave me hell and played the Blame Game on me.

[@ricardini9560]

Had a Ford Fiesta 1.25 zetec for 15 years that went to 240000km. 190000km were with a box K&N. Never changed MAF sensor. My Focus mk1 never used K&N and had to change MAF at 160000km. Go figure...

[@edgraves7098]

So who are you going to believe. The manufacturer of after market parts or the auto manufacturer. Personally I've never trusted a dealer further than I could drop kick them and that has worked for me for 50+ years. Also I don't believe the hype from the after marked industry. I think the design of the mass air sensor is flawed if it is adversely affected by air borne dust or oil because you never either of those around cars or trucks.

[@Thedogfather209]

auto manufactures are the biggest scam artists on the planet lmao

[@blue_sunshline5891]

Here’s some advice. Use the filter as long as you can out of the box. And after 30k miles just toss it away and buy another one. Fuck the cleaning and reusing. If you get a good filter for $50 that can last two years? Then that’s pretty good.

[@1972LittleC]

50 bucks for an air filter? Netherlands, a Bosch air filter for a Volvo V40 (old type, the one that was produced until 2004) sets you back about €10 (about 12,10) including taxes.

[@jumpercable20]

50.00 for a lifetime filter is much better than 50.00 for 2 years. If you keep your vehicle for 10 years as the average, you'll spend 250.00 on filters for 10 years. That's a no brainer, unless cleaning the filter is too much of a chore.

[@twohandsandaradio]

Don't know about all this but I used a K&N one time and could smell the oil in the Truck. Never again.

[@johnwhodat8135]

this filter triggered MAS on my 350z one time. never to use it again. at least not on high performance cars. it worked fine on my Isuzu rodeo though.

[@JosephYoussefOfficial]

11:56 they measured the very tiny weight loss with an only 2 decimal digits accuracy? !?

[@jamielindsay1929]

I thought the exact same by the way. The size of that filter was huge! 2 decimal places wouldn’t recognised small amount of dust or oil.

[@kennethsouthard6042]

In my opinion, this has nothing to do with issues between the factory and K&N or the dealer and K&N, it has to do with issues between the dealer and the factory. Dealers have issues with the reimbursement rates paid by the factory for warranty work, they believe they are too low and have only gotten lower. Therefore, many dealers are always looking for some opportunity to push off the cost to the customer. If they can convince the customer into believing the issue is their fault for installing a K&N filter, they can get significantly more money for the same repair than they otherwise would have gotten from the factory.

[@Larry-cp3uy]

I have never in my life heard of any salesman suggesting to NOT buy his product. These tests have been performed by those trying to sell their product. Yes, I've used K&N filters on carbureted engines, no worries there, and to be honest, I can't say for certain if they really are a better filter because I have no empirical data to suggest a conclusion. Marketing is designed to make the consumers think they have spent their money well, and hopefully create Brand Loyalty for repeat business. I'd think twice about using K&N on Fuel Injected engines because there WILL be some degree of oil suspended in the airstream. Whether or not it's significantly harmful would never be disclosed by the manufacturer, you can count on that. They have a business to run, and sales to be made.

[@danav3387]

I used a k&n air filter in my 2001 dodge ram and now I can't find my birth certificate.. I had it in the top dresser drawer. I tried thier oil filter and I still can't find it.. Anyone else have this happen or any ideas on what to do now? Thanks.

[@-m.d.n-9019]

What?

[@slawiter]

I think your trouble may be in the drying and re-oiling. I did mine a week before Me and my wife went to Spain, and my passport, and travel documents both appeared on my bedroom drawers. Not only that, but my suitcase was also packed ready to go. I also noticed that the k and n recharge kit empty box (which I left ripped in pieces, on the kitchen table) also vanished. And appeared in the recycling bin.

[@El_Scorcho_]

Colourpurpl i made the mistake of cleaning and oiling my air filter. The next day the filter and my wife emptied my bank account and ran off together. Should have listened to that amazon review :(

[@waxsantiago339]

Cleaned my K&N but did not use/spray with oil and NO powertrain light since then...what other proof do you need that its the oil causing the powertrain light + check engine light to come on? I'm telling you, you can contact me anytime if you want to discuss?

[@ZiYiYeap]

K&N is owned by Captain America. Hahaha.

[@Devo1987]

I reinstalled my stock air intake :-)

[@dougl4253]

Test it with a Subaru map sensor

[@DriveTuneMedia]

Generally speaking, MAF sensors are quite robust and simple ie no moving parts. If for *whatever* reason you think the MAF is causing a running issue, you can probably clean it. An article showing how to clean a MAF sensor - strikeengine.com/maf-sensor-cleaning-problems

[@martinlang9615]

StreetandCircuit Exactly, very easy DIY to spray the maf sensor with the correct spray......why are people winging?

[@waxsantiago339]

StreetandCircuit its clean and I know how to clean the MAF, its the K&N oil causing the trouble.

[@angelvargas-sj2lh]

I don't know if it's a coincidence but soon after cleaning my filter i got a cat malfunction code on my 10 accord.

[@AM-wi6zo]

angel vargas You over oiled it

[@ichewtoast111]

angel vargas if you touch the filter does oil get on your hand? If not it could be your ECU changing to the different air intake.

[@codyogden4611]

Why is the inside of my intake pan dusty while running a K&N Air filter and stays spotless when I run an AC Delco

[@patrickscycleshop]

because their filters dont stop dirt... i have replaced countless motorcycle engines that have clear dirt ingestion caused top end failures due to the dirt that went through this companies product.

[@patrickscycleshop]

kzbin.info/www/bejne/rnqzl36BfsZ0pbc

[@patrickscycleshop]

kzbin.info/www/bejne/rnqzl36BfsZ0pbc

[@skip70]

2:16 it would nice if they actually "showed" 5000x magnification.

[@patrickscycleshop]

Here's 4X zoom on my crappy Samsung phone looking through one of their filters. kzbin.info/www/bejne/rnqzl36BfsZ0pbc

[@mc1996]

@@patrickscycleshop i have one, yes, you can kind of see through it, but not that way. Your seems to have only the metal wire mesh and none cotton fibers.

[@patrickscycleshop]

@@mc1996 lol. This is a completely intact k&n filter. I have about 500 filters in a box that coincide with the 500 engines I have in my warehouse that all have compression loss due to dirt ingestion.

[@mc1996]

@@patrickscycleshop i see...so K&N are good after all, they keep your garage full of costumers ;)

[@patrickscycleshop]

@@mc1996 Unfortunately replacing engines is not the kind of work I like to tell my customers they need to do. I would rather do performance work and service work and keep people moving forward instead of going backwards.

You think they would ever admit it?

[@markvanleeuwen6678]

Im k&n certified back in 97. Ill never install another oiled gauze filter on anything ever again.

[@tcdavis66]

They should replace them if we don’t want it. Mine was 54.00$

[@mikenagy3728]

There is no doubt that K and N filters are great for flowing more air. But just how much difference does it make? Can you actually see a difference on the dyno? Can you feel it in the seat of your pants? What are air filters designed to do? Aren't they designed to keep bad particles out of your engine? K And N filters flow more air but the only way you can do that is to have bigger air spaces between the filter medium, which translates into more junk in your engine. "Project Farm" has done an excellent video on different air filters and it turns out K and N were at the bottom for actually filtering out particles.

[@DriveTuneMedia]

I think this is the vid you are referring to kzbin.info/www/bejne/qXuWfWB7YtqZj9E Here is another excellent article on performance air filters, their flow and filtration performance www.billswebspace.com/AirFilterTest.htm

[@jaspercooper1741]

I had an issue with the MAF sensor on my Land Rover, so I cleaned it with a MAF sensor cleaner.

[@320Leonel]

I used throttle body cleaner))

[@jumpercable20]

Some people would rather bitch than do a little preventive maintenance.

[@Mazdatechsenior]

I clean my up and run Oem and got 4 mpg.

[@M0N33R]

I wonder if all K&N employees use those filters? I'd prefer to use original filter & replace it every 2 yrs with a new one - this is much cheaper too :P

[@MrTrailerman2]

Some paper filters are 35-40 dollars ... Just bought 1 for my wife's car...$60. I run k&n in both of my trucks for the last 10 years and not one problem.

[@efrensaclolo7021]

Fram filter for Ford trucks is $10.50 K&N is $49.99 so overpriced, just use Fram.

[@omniken66]

K&N demonstrating that their filters work? That's a red flag right there!

[@coreyhoran1763]

Bought a 2003 f250 7.3 about 5 Year’s ago. Had a k&n filter that was exact stock replacement. Intake and turbo had oil on it but it looked like whoever the idiot was that oiled the filter went a little CRAZY with the application. Depending on the test it all depends on how the oil was applied and how much

[@ZeroG]

So... K&N says K&N isn't bad and "refused to allow our customer to be in the middle of a situation like this"-i.e. if a dealership claims K&N is at fault then they resolve it "one way or another." What does that even mean...? Do they threaten to sic their lawyers on them? They say they tested only 42 malfunctioning sensors where 19 were dead with no conduction and the remaining 23 were giving out-of-range results, of which 19 were damaged by contaminates that SHOULD HAVE BEEN FILTERED OUT BY THE FILTER! Not only is this not enough testing to be statistically relevant, but there is a conflict of interest because K&N's own lab is on K&N's payroll and is not going to come out and say "our most profitable product damages cars instead of protecting them like it's supposed to". Look... Phillip Morris also claimed cigarettes aren't bad for you. Exxon said leaded gasoline wasn't a health risk. This video is nothing more than propaganda. They don't say what killed the 19 totally dead filters, but they do say that their K&N oil on a MAF sensor could produce "awkward" voltages but that the air flow from the engine would clean off the oil after awhile. So now it's the engine's job to clean itself from contaminates put there by the sensor? Could it be that this would depend upon how much air flow there was and how long between engine runs the oil was left sitting on the sensor? Could it be that having some oil WHICH IS DESIGNED TO ATTRACT AND COLLECT CONTAMINATES on the MAF could act temporarily as a magnet for other particulates that will remain on the MAF sensor even after the K&N oil is gone? Just think about it. K&N is proven to filter out less of the dirt in the actual filtered air AND there is a liquid on the filter that is DESIGNED to attract and trap contaminates. If that liquid gets on your sensor it will also put other nasty shit on your sensor until the liquid is dry. Isn't the whole point of a filter NOT to let contaminates in, in the first place? My K&N came from the factory with BEADS of liquid on it AND holes big enough to see through. If it was actually a better technology than paper/cellulos filters then why in the world would ZERO car companies ship their cars with K&N filters pre-installed? Use your damn brain! If a company has to put out apologetic pseudo-science to defend a product that multiple lab tests have shown to be inferior at its primary purpose (filtration!!) then that should be a HUGE red flag to you. Being the official filter of NASCAR where engines last at most a few months is not inspiring either. If your filters don't harm reliability then why isn't it the official filter of Honda or Lexus?

[@adenjyu9483]

I installed a KN filter for my Honda fit 2014 Hybrid model a month ago. After cleaning the MAF sensor, the engine light, VSA light, and the power steering light were on. Then I took my car back to the dealership. They changed a new MAF and replaced the kn filter with manufacturer one. Then the car is good to go. So I think that the kn may not be work for me. Just personal experience sharing. :)

[@ut1004bp]

They think a vehicle's useable life should or might be acceptable at 100,000 miles (as the limit of one of their filter life) note the first person's interview. Not these days guys, these cars now days are on the avg to last the owner 200,000 miles

[@Katwoman4318]

The dealer told me today that my warranty is void because of my K & N filter? So strange. They said it’s a 3rd party & now my warranty is not good. The dealer is a liar & is trying to rip me off. I called K & N and they told me that is BS. I got out of Dodge real quick. They charged me for the sensor hook up. Still a rip off. I might have been born at night; but not last night. Lol 😂

[@nathansstuff1547]

Yeah ok, that's definitely bull. Something so simple as an air filter is definitely something one is allowed to change themselves without voiding any warranty.

[@Katwoman4318]

Thank you for your help. Much appreciated.

[@MrReyG1]

Noah Rule, that they voided your warranty is against the law: en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty_Act

[@rgprgp3454]

K&n keeps rocks and stones out of your engine.not keeping out dust😄

[@patrickscycleshop]

Yep. Here's a good little short video to watch completely to back up what you're saying. kzbin.info/www/bejne/rnqzl36BfsZ0pbc

[@roythearcher]

So.... NO then!

[@rchydrozz751]

Yes they will. Im NOT going to be stranded out in the middle of nowhere again.

[@brandons9138]

Had it happen to me as well. I had just put a brand new K and N in my 03 Altima not more than a week later the MAF was toast.

[@bdtaylor1979]

I’ve used k&n air filters on multiple vehicles and multiple motorcycles and never had an issue. I think the problem comes when the consumer oils the filter after cleaning it and they apply too much oil. The excess oil gets sucked through the intake tube and collects on the MAF sensor and the throttle body.

[@tariqb6305]

K&N all the way 🇺🇸 👌🏾

[@tommymay5901]

Never trust a company to investigate & test their own product. They will show themselves to be rite every time.

[@virgilgray]

I use K&N Cold Air Intake and filter. Works very well and I had an increase in HP and in my mileage. Snowflakes always have asinine opinions.

[@johnmcdonnell81]

If K&N are used by David Vizard that's good enough for me.

[@girohead]

Way to bust that myth (probably propagated by Jiffy Lube or Pep Boys, to sell more filters!). Howevere, I did get my first PO171 lean code and this seems like only possibility, maybe just dirty?

[@DriveTuneMedia]

Or lambda sensor. Check the MAF also, they can get dirty/old regardless of filter.

[@phil20_20]

Dirt got through the filters

[@blackericdenice]

I'm a youtuber with 900+ videos. A 2018 F150 with the 3.3 v6 make 290 hp. So if I put a K&N air filter in there. The engine will make more hp, per K&N. The problem I have with that is. The 2018 5.0 v8 make 395 hp and use the same stock air filter.

[@Gary-rb7wx]

let the dam oil dry for 2 or 3 days and it will be fine

[@hemipower3308]

Gary 666 exactly.

[@07wrxtr1]

I let mine sit for six months... is that long enough?

[@jaspercooper1741]

Good advice

[@CenobiteBeldar]

07wrxtr1 no, obviously.. 🙄

[@Stalkerx13]

If your oil filters are of high class as well why is it that any Purulators going from the most expensive one to the cheapest one still outperforms K&N Oil filters with ease?

[@JohnBoulding]

Don't worry bout the MAF with an oiled filter, but DO worry bout the amount of particles that are passing through that cotton! I have a friend who does testing for many fields, including the race industry and he showed me his data on the amount of particles a K &N passes and it's a large amount. He tested WIx style OEM vs K N and the wix passed about .045 particle below 2-3 microns. The KN filter passed 7.8. that's a HUGE difference.

[@DriveTuneMedia]

There is an old test here but I think the results are probably still relevant strikeengine.com/best-panel-filter-9-brands-compared-on-a-flow-bench/