Thread: 98 GT Gas Octane?

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  1. #1 98 GT Gas Octane? 
    Shingen
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    Default 01-29-2009
    I have just recently purchased a used 98 Grand Prix GT and was wondering if someone could tell me what octane I should be using with this car. I don't have the user manuel and can't seem to find the info in any searches I do. Thanks.
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  2. #2 Re: 98 GT Gas Octane? 
    chrisb
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    Default 01-29-2009
    on any n/a gt 87 will be fine
    99 Grand Prix old build- CAI, Custom exhaust, HV3, Stage 2 TB, custom tune, ported heads intense s1x cam, headers.
    Nothing great Just a small T66 Turbo with a Hv3 On a stock tranny untill i finish the other one.
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  3. #3 Re: 98 GT Gas Octane? 
    Wadeb79
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    Default 01-29-2009
    it's gonna be 87 octane.
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  4. #4 Re: 98 GT Gas Octane? 
    Shingen
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    Default 01-29-2009
    Thanks for the answers.
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  5. #5 Re: 98 GT Gas Octane? 
    UR LOSN
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    Default 01-30-2009
    Regular!
    2001 GTP- PT76 turbo, Intense Drag cars old engine, Stage 4 Intense turbo cam,FMIC,150 wet,Double roller timing chain,Diamond forged coated pistons 8:0:1,Diamond piston rings,Cryoed L32 connecting rods,Cryoed crank,Clevite77 main bearings,Clevite77 cam bearings,Clevite77 L32 rod bearings,ARP Everything, Intense/meizere true billet Flexplate,Intense Wilson UIM/LIM,Intense oil pressure kit,Cometic,OE-R lifters,Cryoed L67 block,ATI turbo dampner,80# inject,Weldon 2035 fp,Aero Fuel Rails,AL cradle
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