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Thread: Gas?

  1. #1
    Member Hamr25's Avatar
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    Default Gas?

    Just wondering what you all run? 87 (Cheapskate!), 89, 91-93, race gas?.

    I just filled up with some 91 on base and i noticed my low end knock is gone and i am averaging like 20mpg as opposed to my 15-17.9.
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    Junior Member MadmikeX3's Avatar
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    I have an old jeep and a big V8 So i just run the Lowest grade gas but I do GUNK carb and gas cleaner every two or three tanks.
    2000 Dodge 2500 SRT6 Cummins Turbo Diesel.

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    If you spot me, I'll do it! socalkenny's Avatar
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    The cheaper the better.

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    covered in mud tickwomp's Avatar
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    I was reading tha manual that came with our commander, and it says DO NOT use anything about 87 octane with the v6 abd 89 octane with the v8. I can't imagine why, though. I always thought the higher octane the better.
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    cheap stuff

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    Senior Member HillBillE's Avatar
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    Both my XJ and '02 F150 run better/get better milage on the 87 octane.

    My XJ ('99) the 'check engine' light comes on if I run 89 or higher!

    On my CJ, I get a bit better milage running 91 octane Non-oxygenated fuel, but the cost isn't worth the gain, and not all stations carry the non-oxygenated fuel.


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    STICKERS notarubicon's Avatar
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    if it doesnt say to run higher octane in your vehicle then you really shouldnt there is no real added benefit and you dont get a complete burn when it ignites causing gunk build up
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    covered in mud tickwomp's Avatar
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    My BMW 335i ran 93 octane at the lowest. It would tolerate 91 octane, but the engine would retard.
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    Land Squid Jeffb_79's Avatar
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    87.
    That's what the engine was made for, that's what I run.
    If someone out there is getting 3.5-5MPG increases running a step higher in octane with no tuning.... I call shenanigans.

  10. #10
    Junior Member MadmikeX3's Avatar
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    Quote Originally Posted by Jeffb_79 View Post
    If someone out there is getting 3.5-5MPG increases running a step higher in octane with no tuning.... I call shenanigans.
    In my 240sx I was able to get a total 50-60 more miles per tank when i stepped up to 93. Only other upgrade was from Bosh platinum's to NGK platinum's.
    2000 Dodge 2500 SRT6 Cummins Turbo Diesel.

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