Octane 87 and the SI

Discussion in 'Civic Si Models' started by RightNow800, Jan 22, 2017.

  1. RightNow800

    RightNow800 Member

    Messages:
    8
    Anyone here fills up with regular gas?

    As frowned upon as this may be on the forums here, I would still like to know if any SI owner does this.
     
  2. webby
    • Staff
    • 2020 Toys For Tots

    webby Administrator

    Messages:
    52,087
    It will run by pulling timing to avoid knocking. It will reduce horsepower and torque when it happens. Will it run,... yes. Is it supposed to run on 87,...no. In addition to power being lost, you'll also hurt fuel economy by running 87. The $2-3 dollars a fill up for premium makes up for difference.
     
    Nix likes this.
  3. bauer311
    • Supporting Member

    bauer311 Supporting Member

    Messages:
    3,083
    Location:
    Fayetteville, NC
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    Hell, I run premium in my '15 ex. I was paying so much for regular in ny, when I moved to colorado it was still cheaper and it keeps my mpg up compared to the regular they put in the car when I bought it.

    Sent from my SM-N920V using Tapatalk
     
  4. NoMoreNissans

    NoMoreNissans Well-Known Member

    Messages:
    512
    Location:
    Ottawa, Canada
    Vehicle Model:
    Civic LX
    Body Style:
    Sedan
    there is zero benefit to putting higher octane in an engine that isnt designed to make use of it
     
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  5. bauer311
    • Supporting Member

    bauer311 Supporting Member

    Messages:
    3,083
    Location:
    Fayetteville, NC
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    That may be what a book says, but seeing is believing...That's the only reason I continue to do it. I suppose the argument could be made that different people have different experiences. Or that the quality of the gas I had before was poor, I dunno, just doing what works for me.

    Sent from my SM-N920V using Tapatalk
     
  6. NoMoreNissans

    NoMoreNissans Well-Known Member

    Messages:
    512
    Location:
    Ottawa, Canada
    Vehicle Model:
    Civic LX
    Body Style:
    Sedan
    well look at it this way, even IF you're getting more miles per gallon on premium, you're paying more per gallon at the pump!

    not tryin to be a jerk I just dont want you to waste money. you likely work hard for it
     
  7. Enigma346

    Enigma346 Well-Known Member

    Messages:
    225
    Location:
    Virginia Beach, VA
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    That explains some things. By using premium again, it will put timing back as well as the HP and torque?
     
  8. webby
    • Staff
    • 2020 Toys For Tots

    webby Administrator

    Messages:
    52,087
    Yes. The ecu adjust things automatically. If you run premium you'll get the hp/tq and fuel economy back.
     

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