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OEM Paper Style Airfilters vs Aftermarket

  • 26-08-2009 9:18am
    #1
    Matt Simis
    Registered Users, Registered Users 2 Posts: 8,718 ✭✭✭


    Just came across this, its a question that pops up on Car forums a lot but Ive never seen these tests before:

    http://duramax-diesel.com/spicer/index.htm
    One of the charts, total grams of dirt allowed through by the filter:
    image006.jpgimage010.jpg
    In the chart above it’s important to note the different test durations for each filter. The AC Delco filter test ran for 60 minutes before exceeding the restriction limit while the AMSOIL and K&N tests each ran for 20 and 24 minutes respectively before reaching max restriction. In 60 minutes the AC Filter accumulated 574gms of dirt and passed only 0.4gms. After only 24 minutes the K&N had accumulated 221gms of dirt but passed 7.0gms. Compared to the AC, the K&N “plugged up” nearly 3 times faster, passed 18 times more dirt and captured 37% less dirt. See the data tables for a complete summary of these comparisons.

    There have been alegations against K&N that the Oil in their Oil treated filters damage MAFs, they did their own tests to (apparently) disprove this. However looking at the report, perhaps Oil wasnt killing the MAFs, but the sheer amount of dirt that passed through?
    Im thinking Ill switch from Oil type to Foam based filters if I go aftermarket in the future.


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