Down sides to k&n filters?

Discussion in 'General Station Wagon Discussions' started by RoadmasterWB4, Jun 7, 2013.

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  1. Safari57

    Safari57 Well-Known Member

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    In December I swapped from stock to K&N filter on my 2005 L33 5.3L truck. Gained 2 mpg towing a 4,000lb trailer all over the mountains and across WA, OR, CA, AZ, NV, ID. With the kind of miles we put on that made a nice difference. We also noticed that the truck seemed to be working a bit less going up some of the real ugly hills, and still getting the better mileage.

    The downside - well, I honestly can't say I have one to tell you. Sorry about that.
     
    Safari57, Jun 11, 2013
    #16
  2. junkyardjeff

    junkyardjeff Active Member

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    My bronco came with one so I bought the cleaner kit and will keep on using it,my girlfriends Dodge truck hadsa funky aftermarket air cleaner with a cone filter that broke so I am going back to a stock filter box and looking to run the inlet to the grille so it will get cold air.
     
    junkyardjeff, Jun 12, 2013
    #17
  3. RoadmasterWB4

    RoadmasterWB4 Well-Known Member

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    Just finished a mileage check since I put in the k&n drop-in filer. 560 miles, 30.5 gallons (18.4). Mixed driving, mostly local roads. This is about what I usually got with the paper filter, maybe a little more. It does seem to have more pep though. I find myself way over the speed limit a lot more often. Might be imagining it. I will run one more tank and the put the paper back in for comparison.
     
    RoadmasterWB4, Jun 16, 2013
    #18
  4. MikeT1961

    MikeT1961 Well-Known Member

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    A G.M. tech frind suggested he switch to a MagnaFlow muffler, which he did. When that was combined with a K&N filter and proper routing for the cold air intake, and the SuperChips tuner done for Tow/Haul, his computer told him he was using 8.9 litres per 100 km, which is about 32 miles to the Imperial gallon. That works out to something like 28 miles to the U.S. gallon. In a Tahoe with the 5.3 V-8.
     
    MikeT1961, Jun 17, 2013
    #19
  5. patrick80

    patrick80 Wagonista!

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    I've had six different diesel-powered pickups, and used K&N filters in all but one. The K&N gave me close to two mpg better than the paper filters did in all five applications (four Dodge Cummins trucks and one Ford PowerStroke truck). The one that still used the paper filter was a '71 IH Travelall with a 354 turbo Perkins, of which there was no K&N application for.

    My '66 Dodge has had a K&N filter for 30+years with zero issues. My wife's '78 New Yorker with a 440 also has a K&N - no problems.

    When you buy performance filters, you MUST READ the instructions, and be consistent in its servicing. It's too easy.
     
    patrick80, Jun 19, 2013
    #20
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