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Engine air filter OEM vs replacement

Discussion in '5th Gen 4Runners (2010-2024)' started by roymm, Aug 19, 2022.

  1. Nov 2, 2023 at 8:02 AM
    #61
    2016Pro

    2016Pro Why all of the Pro hate?

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    Placebo, it won't make any noticeable difference
     
    4runningMan[QUOTED] likes this.
  2. Nov 2, 2023 at 8:03 AM
    #62
    2016Pro

    2016Pro Why all of the Pro hate?

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    K&n is crap, snake oil. Avoid them
     
  3. Nov 2, 2023 at 9:22 AM
    #63
    whippersnapper02

    whippersnapper02 New Member

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    There's no gain from them even in replacement cost. Even under dusty conditions, Toyota recommends a replacement at 36K miles or 3 years and simple inspections until then. A Wix replacement is $30 while a K&N is $65 so it will take you over 6 years or 72K miles to cover the cost of a K&N. Plus they are known to pass more dirt than paper.
     
  4. Nov 2, 2023 at 10:06 AM
    #64
    trail_runner_93

    trail_runner_93 New Member

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    Thanks for the feedback. Used it on my Tacoma with no issues. Will stick with OEM for now.
     
    2016Pro likes this.
  5. Nov 2, 2023 at 10:13 AM
    #65
    glwood54

    glwood54 Stop making me buy stuff!

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    Plus reports of oil residue on in the intake and MAF sensor.
     
  6. Nov 2, 2023 at 10:19 AM
    #66
    3JOH22A

    3JOH22A Toyota Gigolo

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    Placebo. If you want more fictional horsepower, rip out the carbon filter in the airbox lid when you aren't in California :evil:

    BTW, Denso sells the primary air filter under P/N 143-3025, available from indie parts stores or online. Might save you some money avoiding Toyota and dealer markups.
     
    Last edited: Nov 2, 2023
    jgalt and 2016Pro like this.
  7. Nov 2, 2023 at 10:37 AM
    #67
    whippersnapper02

    whippersnapper02 New Member

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    I can honestly say that I didn't have issues running one on my Ranger but I just wouldn't now because there's no reason to.
     
    trail_runner_93 likes this.
  8. Nov 2, 2023 at 12:41 PM
    #68
    4runningMan

    4runningMan New Member

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    Well, I went and got a Purolator One filter. Looks just like the thick OEM one with the pre-filter and truck is back to feeling normal again after running the thinner filter for a couple weeks.
     
  9. Nov 2, 2023 at 12:46 PM
    #69
    Steely123

    Steely123 What's the new trend? I'll do it!

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    I've had no issues what so ever. Been running them on every vehicle for engine and air cabin filter. Personally, I don't run them for any type of claimed gains, only the re usable factor. 2 cleanings and you've paid for it.
     
  10. Nov 3, 2023 at 4:54 PM
    #70
    4runningMan

    4runningMan New Member

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    After another day running the Purolator One, the difference is night and day compared to the thin Toyota filter.

    Now I’m wishing one of you would go get a Purolator to try in place of the thin filter so you can tell me this is all in my head. But seriously, the truck runs so much better. I’m amazed.
     
    2ndGen22re likes this.
  11. Nov 3, 2023 at 5:25 PM
    #71
    Trail Runnah

    Trail Runnah New Member

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    Interesting. I'll have to pick one up next time I change the filter, I've been buying the factory Toyota filters off Amazon, they've been coming in with the pre-filter.
     
  12. Nov 3, 2023 at 6:23 PM
    #72
    4runningMan

    4runningMan New Member

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    Which Amazon seller are you using for the OEM?

    FYI- I got the Purolator (A36122) at Autozone.
     
  13. Nov 3, 2023 at 6:36 PM
    #73
    4runningMan

    4runningMan New Member

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    I don’t know enough about engines, filters, and air flow dynamics to speculate… but someone here pointed out the new thinner OEM filter has more pleats to compensate for the decrease in overall thickness from the original OEM filter.

    I’ll point out this would also decrease the amount of “square inches” for air to pass through the filter’s surface plane.

    If you increase the number of pleats to make the filter thinner but retain the same surface area of the filter medium, you’d also have to decrease the porosity of the filter to maintain the same amount of airflow.
     
  14. Nov 3, 2023 at 7:04 PM
    #74
    2016Pro

    2016Pro Why all of the Pro hate?

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    You can remove the air filter and the truck will run the same.
     
  15. Nov 3, 2023 at 8:10 PM
    #75
    4runningMan

    4runningMan New Member

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    What if you ran a very restrictive filter? What effect would that have?
     
  16. Nov 3, 2023 at 9:37 PM
    #76
    4runningMan

    4runningMan New Member

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    A couple photos I grabbed off Amazon. New thin vs old thick OEM filters. And the Purolator, which has a metal screen over the top for reasons unknown.
    IMG_8122.jpg IMG_8123.jpg
     
  17. Nov 5, 2023 at 8:39 AM
    #77
    McSpazatron

    McSpazatron New Member

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    I really liked the thick filter mine came with from the factory, but not because I could tell a difference. I’ve run the purolator one, the toyota OE thin replacement, and NAPA/Wix thick filter with prefilter. Couldn’t tell a lick of difference.
     
    nimby and 4runningMan[QUOTED] like this.
  18. Nov 5, 2023 at 9:15 AM
    #78
    Lc200

    Lc200 Member

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    There is absolutely no measurable difference between all three. It's all placebo.
    I had the thicker one last year, changed it to what the dealer had, which was the thinner one this year and will now get the Purolator.
     
    nimby, 2016Pro and 4runningMan like this.
  19. Nov 5, 2023 at 3:13 PM
    #79
    Trail Runnah

    Trail Runnah New Member

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    4runningMan[QUOTED] likes this.
  20. Nov 5, 2023 at 7:57 PM
    #80
    clonebuilder

    clonebuilder New Member

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    The Hengst ones from rock auto are cheap and top quality too.
     
  21. Nov 14, 2023 at 5:51 AM
    #81
    Greg D

    Greg D New Member

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    Borla exhaust, Jet MAF sensor, K&N filter, Hayden rapid cool transmission cooler, Hella horns, electric fan, Pedal Commander, Derale power steering cooler,
    Me too. Wholesale Toyota parts online. I have gotten several counterfeit parts from Amazon. I buy Toyota Wholesale online now. Prices are not that bad for real quality.
     

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