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SPARK PLUGS

Discussion in 'Performance and Tuning' started by MARSHBUSTER, Oct 25, 2011.

  1. Oct 25, 2011 at 9:50 PM
    #1
    MARSHBUSTER

    MARSHBUSTER [OP] Well-Known Member

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    What brand of Spark Plugs are you running in your 4.0 V6? What mileage did you change your stock plugs at?
     
  2. Oct 25, 2011 at 9:54 PM
    #2
    Slodgetto

    Slodgetto Über Posre

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  3. Oct 25, 2011 at 9:55 PM
    #3
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Stock plugs and change them every 30K for the 4.0.
     
  4. Oct 25, 2011 at 9:57 PM
    #4
    Texoma

    Texoma Well-Known Member

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    Denso iridium long life cuz I don't wanna change plugs again til 100kmi, switched em' at 30k mi. So far so good, but if they piss me off and make my engine run like shit, I'll switch back to oem denso's.
     
  5. Nov 3, 2011 at 4:42 PM
    #5
    MARSHBUSTER

    MARSHBUSTER [OP] Well-Known Member

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    Thanks for the input, I changed them today and they sure needed it. Previous owner had used NGK and I went back to the OEM DENSO stock plugs. Now I am hoping to see my mileage increase from 16 MPG to more.
     
  6. Nov 4, 2011 at 7:34 AM
    #6
    iroh

    iroh Well-Known Member

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    Technically NGK is OEM... on the driver's side!
     
  7. Nov 4, 2011 at 7:37 AM
    #7
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    I doubt the spark plugs are causing your mileage to be that bad. Ease up on the skinny pedal a bit and you'll see much more of an improvement.
     
  8. Nov 4, 2011 at 10:24 AM
    #8
    RecklessTaco

    RecklessTaco Ainokea

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    That is when you Buy the truck. But when you replace them, they give you all OEM Denso plugs!;)
     
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