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Thread: Spark Plugs

  1. #11
    Senior Member Getting Dirty lekmedm's Avatar
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    Quote Originally Posted by indymtb View Post
    I have the Denso iridium plugs. Spent too much but they have been great plugs. It took 4+ hours to change the 16 plugs (for me - I am a mechanic wannabe) so I thought the iridium might last 50-60K instead of the recommended 30K miles
    I went ~90k on my first set of iridiums, and they still looked good when I pulled and replaced them.
    2007 Commander Overland / 4" SuperLift / 285/70R17 Cooper Discoverer ST Maxx / Rusty's adjustable rear UCAs / Carolina Driveline front drive shaft / Flashpaq / DRLs & Tilting Mirrors / Autolite Iridiums / Cobra 29LX Chrome LE CB & Firestik antenna / Rear fog lights / Mopar Grille Guard with HID driving lights
    "4 wheel drive does not mean 4 wheel stop!" -Lee Goldberg, WABC TV weatherman

  2. #12
    Member Looking for Dirt redrockv8's Avatar
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    Quote Originally Posted by lekmedm View Post
    I went ~90k on my first set of iridiums, and they still looked good when I pulled and replaced them.
    I have a 2014 Grand Cherokee with hemi. I was told I have iridiums and that they are standard in all 2014 hemi's. Service dept at dealer checkd my VIN to veryify I had iridiums. He said they are good for 100,000 miles. Prior to 2014 only police package hemi's were equiped whth iridiums.
    I already have it in my head that I want a 2020 Grand Cherokee so (I'm old and this will be my last hurrah)I'm sure I'll have the new one before I reach 100,000 miles on this one.
    Maybe by 2020 they will wise up and produce another Commander. I'd buy one in a heartbeat.
    HT

  3. #13
    Senior Member Getting Dirty The_War_Wagon's Avatar
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    Lightbulb

    Got a friend (he's from Liberia, and not really up on Jeeps!!!) with an '06 5.7 WK that needs plugs. I'm gonna help him, so any recommendations is welcome!
    '07 Jeep Commander, Rocky Mountain Edition - 287 V-8 - Superchipped - aFe Stage II R-5A CAI - Flowmaster Super 44 - 2" Daystar lift - Spidertrax spacers - 32x10.5x17 Cooper A/T's - Fastman throttlebody - Skyjacker 8000 shocks

  4. #14
    Senior Member Getting Dirty
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    BUMP, are you guys changing your plugs at 30k?

    just changed mine at 90k, just rolled 120k
    2007.5 WK Laredo
    - OEM+ -

  5. #15
    Lifetime Member Getting Dirty Matt's Avatar
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    Yeah I change mine every 30k.... I'll be hitting 60k on the odometer in about 2 months

  6. #16
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    I changed mine at around 90k, and dang were they shot, haha I have no idea is any of the previous owners had ever changed the plugs. 30k seems reasonable to me. Heck why not? <$20 for Champion stock replacements.
    2007 XK Limited
    4.7 Flex
    QDII
    Superchips Flashpaq

  7. #17
    Senior Member Getting Dirty The_War_Wagon's Avatar
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    Quote Originally Posted by paroxysym View Post
    BUMP, are you guys changing your plugs at 30k?

    just changed mine at 90k, just rolled 120k
    Changed mine @ 60k, because that's when I bought it. ALMOST to 80k now - got a while 'til the next batch.
    '07 Jeep Commander, Rocky Mountain Edition - 287 V-8 - Superchipped - aFe Stage II R-5A CAI - Flowmaster Super 44 - 2" Daystar lift - Spidertrax spacers - 32x10.5x17 Cooper A/T's - Fastman throttlebody - Skyjacker 8000 shocks

  8. #18
    Senior Member Getting Dirty lekmedm's Avatar
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    If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!
    2007 Commander Overland / 4" SuperLift / 285/70R17 Cooper Discoverer ST Maxx / Rusty's adjustable rear UCAs / Carolina Driveline front drive shaft / Flashpaq / DRLs & Tilting Mirrors / Autolite Iridiums / Cobra 29LX Chrome LE CB & Firestik antenna / Rear fog lights / Mopar Grille Guard with HID driving lights
    "4 wheel drive does not mean 4 wheel stop!" -Lee Goldberg, WABC TV weatherman

  9. #19
    Senior Member Getting Dirty The_War_Wagon's Avatar
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    Quote Originally Posted by lekmedm View Post
    If you are running OEM copper plugs, change every 30k miles. If you run iridiums, you can change every 100k miles!
    Well that's what I THOUGHT, but I wasn't sure. I switched to NGK iridiums when I changed mine at 60k.
    '07 Jeep Commander, Rocky Mountain Edition - 287 V-8 - Superchipped - aFe Stage II R-5A CAI - Flowmaster Super 44 - 2" Daystar lift - Spidertrax spacers - 32x10.5x17 Cooper A/T's - Fastman throttlebody - Skyjacker 8000 shocks

  10. #20
    Senior Member Getting Dirty sean112280's Avatar
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    I have the 4.7 with the copper plugs. can somebody help me verify what the gap should be? I am double checking. thanks

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