87 vers 93 octane fuel

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Thread: 87 vers 93 octane fuel

  1. #1
    5th Gear GM Master Tech's Avatar
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    87 vers 93 octane fuel

    Has anyone ever done a dyno test for 87 octane fuel vers higher octane fuel? I think the results could be interesting

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  3. #2
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    No, but I know for a fact that these things have way too much timing in stock form. After logging with HPtuners I'm running nothing but 91 octane minimum.

  4. #3
    5th Gear GM Master Tech's Avatar
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    Thanks just what i was wondering.If thats the case it would have to be able to make more power with higher octane fuel ! Just how much i would like to know

  5. #4
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    Quote Originally Posted by GM Master Tech View Post
    Thanks just what i was wondering.If thats the case it would have to be able to make more power with higher octane fuel ! Just how much i would like to know
    I think the real question is how much power is being lost to knock retard when running on 87.

    2012 ECO MT - Black Granite/Cloth; 814 mile range; Bluetooth Stereo AUX; OEM Fogs w/Chrome Covers; GM Spare tire; VG Shark Fin
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  6. #5
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    I don't think any HP test has been done.
    Cruze 1LT M6 - K&N Drop In, Intake Resonator Delete, Black Label Tuned - 162whp/186wtq @ 18.5psi
    GSXR750 - Turbo, E85, approx 220whp
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  7. #6
    Off-Road Champion OnlyTaurus's Avatar
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    Never used anything but 93 octane. Drives like a dream with it.
    ErikBEggs and XtremeAaron like this.
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  8. #7
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    well i know for sure GM could never have successfully marketed that power train with out saying it would run on 87 octane
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  9. #8
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    It does run on 87 octane, just not as well as it does on 91 or 93 octane, especially in the summer heat.
    jdubb11 likes this.

    2012 ECO MT - Black Granite/Cloth; 814 mile range; Bluetooth Stereo AUX; OEM Fogs w/Chrome Covers; GM Spare tire; VG Shark Fin
    2010 Mit Lancer GT MT (traded for ECO @31K miles)
    2002 Pont Montana AWD (traded for 2012 LS @182K miles)
    1990 Pont Transport (traded for Montana @240K miles)
    1986 Fiero GT MT (traded for Transport - needed more seats)
    1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)

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    My concern is the cracked pistons that are turning up now !

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    Handbrake Released montess1's Avatar
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    Has anyone used ethanol free 90 octane fuel ? It should do better than pump gas with 10% ethanol as you lose some power and mileage with the ethanol fuel.

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