Spark Plugs

Discussion in '9th Generation Civic General Discussion' started by PainlessCandy, Oct 5, 2018.

  1. PainlessCandy

    PainlessCandy Well-Known Member

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    Civic Si
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    Hey guys. I have the Spark Plug replacement popping up on my MM @ 105k miles. I was wondering if anyone has recommendations on better ones (NGK Iridium?) or if OEM is fine. Someday I'll be boosted, so it'd be nice if they were suitable for that. Not seeing much in the way of threads about them specifically, so figured I'd ask.

    Also, interesting news to report on an old warranty claim come next week!

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  2. dpetro1

    dpetro1 Well-Known Member

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    Ngk ILZKR7B-11S should be the oe part on some cars. Otherwise denso SXU22HCR11S. Can't go wrong with either, I prefer ngk. You would want to wait to swap to a colder plug once you go boost. No benefit to doing it prior.

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  3. webby
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    oem NGK is the way to go. Swap to colder plugs when you go with forced induction as mentioned ^
     
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  4. PainlessCandy

    PainlessCandy Well-Known Member

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    350
    Location:
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    Civic Si
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    Thanks guys!

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  5. ScottDR

    ScottDR New Member

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    Vehicle Model:
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    I recommend the newest technology from NGK, ruthenium. Same price as iridium but smoother cold starts and lower cold start idle. Free MPG/power boost, albeit small (~2% efficiency increase for me).
     
  6. HawaiiPD

    HawaiiPD Active Member

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    Location:
    Oahu, Hawaii
    Vehicle Model:
    Civic
    Body Style:
    Sedan, LX.
    When I change the plugs, I might go with the new Ruthenium with the same heat range #7 as the OEM. But my '13 Civic has only 15K miles, a long way to go before the changes.
     
  7. fahnix

    fahnix Well-Known Member

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    Holy smokes! 15k on a 13'?? And here I was thinking I had low miles at 60k on a 12'!!
     
  8. Flightmaster127
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    Flightmaster127 Supporting Member

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    I actually just replaced my OEM plugs last week at 68K. I know the service interval is supposedly 100K but its been 5 years and several track events so I figured it can't hurt anything. Went with OEM NGK plugs. Car ran smoother after for sure. I will say though that whatever engineer though putting the plugs under a tray that requires you to take off the wipers and cowl can go to hell.
     
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  9. sunofwolf

    sunofwolf Well-Known Member

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    What kind of plugs are those OEM's? In the Neon's this takes just 20min to change the spark plugs. Another win for the Neon. I don't yet have 20k miles on my 2013 Honda si- and knew the spark plug change over the neon spark plug change is 5x harder. Maybe the engine is pulled back in the Honda more?:confuzzled:
     
  10. fahnix

    fahnix Well-Known Member

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    It is.
     
  11. webby
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  12. sunofwolf

    sunofwolf Well-Known Member

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    guess they are just like the honda vfr 800 uses. Ok I say replace at least every 50k miles or less maybe not needed?
     
  13. ron v
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    ron v The Forum Idiot

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    I just recently did my fourth plug change. 56k
     
  14. webby
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    :confuzzled: plugs should have no issue to 100k miles.
     
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  15. ron v
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    ron v The Forum Idiot

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    Yea. I have my reasons. All of which u guys would find stupid. Just like a I change my oil way sooner then I should. Sorry webby.
     
  16. webby
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    you mean change your plugs way sooner than you should? Or you're doing plug changes with your oil change schedule :shady:
     
  17. ron v
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    ron v The Forum Idiot

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    Edit!!! Only 3 times. When I tuned it for full bolt ons on 91. Again on e85. And just recently just because.
     
  18. webby
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    well I could see if you switched over to e85 and maybe even had them gapped differently
     
  19. ron v
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    ron v The Forum Idiot

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    in the end. To each their own. I don’t drive the si much anymore but when I do it’s usually hard so I want everything on tip top shape.
     
  20. sunofwolf

    sunofwolf Well-Known Member

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    2,294
    Vehicle Model:
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    notice any improvement over your plug changes? In a Motorcycle those types of plugs last only maybe a third of what a car would do to the higher rpm's.
     

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