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K & N cold air intake worse gas mileage

Discussion in 'Performance and Tuning' started by glaziers27, Jan 16, 2013.

  1. dually

    dually Low and slow

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    Not as many as the 98..
    You have to think 'placement of MAF'. Which is behind a free-er flowing filter. Thus the MAF is reading increased CFM of air.
     
  2. Bobbb

    Bobbb "Rumors of Bob, but never Bob. It is Bob, right?"

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    This was my first thought. OP didn't say when they did the swap. Might have been around the same time their usual watering hole switched over to crap blend for the season.

    I'm still stock on my '11, but I did do the K&N swap on my '04 Wrangler and it gave me a 2-3 highway MPG boost even though K&N said not to expect one. Or course my Taco has even more electronic crap on it than the Jeep did. :(
     
  3. Aw9d

    Aw9d That one guy

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    They come over oiled because they sit on the shelves for years before they get sold typically.

    Once you get a new one, take it out of the bag and wash it good. Then lightly, lightly, lightly oil it. Clean the MAF as well. 99% of peoples problems with K&N is due to them soaking the piss out of it in oil. I've ran K&N's in everything I've ever owned, never once had an issue.
     
  4. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    No its not. I have monitored the GPS's (grams per second) readings from the MAF with OEM intake, and others, and there is no change. The only thing affecting the reading is the amount of throttle thats open. The air filter is virtually invisible to the engine.
     
  5. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    To add, colder air holds more O2, thus causing the engine to run more fuel. MPG generally suffer in the winter because of, not only the crap gas, but also the colder, denser air.
     
  6. dually

    dually Low and slow

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  7. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    I understand what you are saying. What Im telling you is, The GPS were not affected by the kind of filter installed. This is a direct measure of how much air is flowing thru the MAF. If more air was in fact going into the engine, it would have shown an increase in the GPS.
     
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