1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Thoughts on K&N air filters?

Discussion in 'Performance & Tuning' started by 17 jku, May 3, 2020.

  1. May 3, 2020 at 8:52 PM
    #1
    17 jku

    #1
    17 jku [OP] Member

    Joined:
    May 3, 2020
    Member:
    #4615
    Messages:
    6
    Gender:
    Male
    First Name:
    John
    Vehicle:
    2017 jku sport
    Sport package (factory)
    What do y’all think about running a K&N air filter?
     
    17 jku, May 3, 2020
    #1
  2. May 4, 2020 at 5:08 AM
    #2
    monkeygrip

    #2
    monkeygrip Active Member

    Joined:
    Dec 22, 2018
    Member:
    #2792
    Messages:
    33
    First Name:
    Sid
    Vehicle:
    2015 Wrangler Sport
    I'm interested to know this too...
     
    monkeygrip, May 4, 2020
    #2
  3. May 4, 2020 at 11:12 AM
    #3
    aggrex

    #3
    aggrex Well-Known Member

    Joined:
    Sep 12, 2016
    Member:
    #203
    Messages:
    4,840
    DE
    Vehicle:
    Backcountry '16
    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    K+N filters / K+N CAI. Topic is highly debatable with some reviews indicating little to no HP gain or increased high rpm flow (loud) at the expense of quality filtration or tedious to properly clean/re-oiling the filter, etc. CAI intakes look cool under the hood but offer less protection against hydrolock during water crossing. My take on this is too stick with OEM quality filters and snorkels if looking for true CAI
     
    aggrex, May 4, 2020
    #3
    Anderson, JKBob 25 and Prerunner1982 like this.
  4. May 4, 2020 at 3:02 PM
    #4
    Jim Beam

    #4
    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    596
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    I have been using a K&N for many years on my CJ with a throttle body. It does not work as good as a conventional air cleaner element but it is a whole lot cheaper than having to buy those expensive things every time I go on a Jeeping trip. When the inside of the throttle body gets a bit dirty which it will even with a paper unit I just spray it down with some cleaner spray.
     
    Jim Beam, May 4, 2020
    #4
    JKBob 25 likes this.
  5. May 5, 2020 at 6:11 PM
    #5
    chris4x4

    #5
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    4,068
    Gender:
    Male
    I think alot depends on where you live. I live in the desert, and its dry and dusty. K&N filters, along with other oiled gauze filters, do not seem to filter the dirt enough for my taste. WHen I ran them, my oil samples came back with really high silica levels. Since switching back to OEM style filters, no more silica in the oil.
     
    chris4x4, May 5, 2020
    #5
    Anderson, JKBob 25, Prerunner1982 and 1 other person like this.
  6. May 6, 2020 at 2:26 AM
    #6
    17 jku

    #6
    17 jku [OP] Member

    Joined:
    May 3, 2020
    Member:
    #4615
    Messages:
    6
    Gender:
    Male
    First Name:
    John
    Vehicle:
    2017 jku sport
    Sport package (factory)
    Thank you I live in South Carolina a lot of summers when your off-road it’s pretty dry and dusty, other summers not so much. I’ll stick with oem filter.
     
    17 jku, May 6, 2020
    #6
  7. Aug 10, 2020 at 8:56 AM
    #7
    Jeep4Life

    #7
    Jeep4Life Well-Known Member

    Joined:
    Aug 1, 2018
    Member:
    #2476
    Messages:
    981
    Gender:
    Male
    Vehicle:
    2012 Jeep Wrangler Unlimited
    I’ve had K&N engine air filter for couple years now. Biggest thing is you don’t have to buy a filter every time. But I did notice when I first changed to it I gained 1MPG. So it really pays for itself after driving for 50miles.
     
    Jeep4Life, Aug 10, 2020
    #7
  8. Aug 10, 2020 at 2:58 PM
    #8
    Prerunner1982

    #8
    Prerunner1982 Well-Known Member

    Joined:
    Aug 4, 2017
    Member:
    #1745
    Messages:
    1,356
    Gender:
    Male
    First Name:
    Jon
    Vehicle:
    93 XJ 2 door
    Closer to 455 miles for just the filter, or 1382 for the CAI depending on what you spend on gas of course, and your current situation as it could take quite a while to get that 1382 miles.
    I went from doing 50 miles a day to doing 50 miles a week.
     
    Prerunner1982, Aug 10, 2020
    #8
    JKBob 25 and Jeep4Life[QUOTED] like this.
  9. Aug 11, 2020 at 6:38 AM
    #9
    Jeep4Life

    #9
    Jeep4Life Well-Known Member

    Joined:
    Aug 1, 2018
    Member:
    #2476
    Messages:
    981
    Gender:
    Male
    Vehicle:
    2012 Jeep Wrangler Unlimited
    depends on how much you poaid for the filter too. I paid only $40 when it was on sale.

    Edit: just noticed I put 50miles on my other post. It should have actually read 500miles. Missed a zero lol.
     
    Last edited: Aug 11, 2020
    Jeep4Life, Aug 11, 2020
    #9
    chris4x4 and Prerunner1982[QUOTED] like this.
  10. Aug 22, 2020 at 8:02 AM
    #10
    chris4x4

    #10
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    4,068
    Gender:
    Male
    I mean.....Are you getting 2 MPG? Thats the only way I can see the math working.
     
    chris4x4, Aug 22, 2020
    #10
    Jeep4Life[QUOTED] likes this.
  11. Aug 22, 2020 at 9:09 AM
    #11
    LYFZGOOD

    #11
    LYFZGOOD members

    Joined:
    Jul 22, 2017
    Member:
    #1701
    Messages:
    932
    Gender:
    Male
    Wv
    Vehicle:
    1998 Jeep Wrangler Sahara
    2.5” lift 32x11.50x15,cold air intake, Smittybuilt stainless steel Bumpers, rough county pocket flares,Rugged ridge seat covers and floor mats. Conversion LED headlights 20’ LED Light bar hardtop,soft top,bikini top.
    I would find that amazing if you get 2 miles a gallon better just by changing the air filter we change multiple things on diesel engines just to get a 10th of a mile better. That’s my two cents :anonymous:
     
    LYFZGOOD, Aug 22, 2020
    #11
  12. Aug 23, 2020 at 7:31 AM
    #12
    chris4x4

    #12
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    4,068
    Gender:
    Male
    Agree. Driving style and air temperature impacts MPG more than an air filter swap. Ultimately, The throttle body butterfly dictates fuel economy. The airflow of OEM air filters greatly exceed the engines MAX CFM requirement.
     
    chris4x4, Aug 23, 2020
    #12
    aggrex and LYFZGOOD[QUOTED] like this.
  13. Aug 24, 2020 at 7:26 AM
    #13
    Jeep4Life

    #13
    Jeep4Life Well-Known Member

    Joined:
    Aug 1, 2018
    Member:
    #2476
    Messages:
    981
    Gender:
    Male
    Vehicle:
    2012 Jeep Wrangler Unlimited
    It was a typo. I missed a zero on my first post, 500miles not 50.
     
    Jeep4Life, Aug 24, 2020
    #13
    chris4x4[QUOTED] likes this.
  14. Aug 29, 2020 at 7:54 AM
    #14
    chris4x4

    #14
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    4,068
    Gender:
    Male
    Gotcha. If fuel is $2.40 a gallon (Out here, thats about what it is), you save $4.41 in 500 miles, IF you are getting 16 mpg. If you get more, you save less. For example, if you go from 20 mpg to 21 mpg, you save $2.86. Frankly, I see a 4 to 5 mpg change depending on how Im driving, temperature, windows up/down, etc. An air filter just doesnt make a difference unless its plugged.
     
    chris4x4, Aug 29, 2020
    #14
    Anderson and Jeep4Life[QUOTED] like this.
Register FREE to Reply!
To Top