Thread: Horrible gas mileage for my 06 GXP

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  1. #1  
    I live here. DirtDog's Avatar
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    Hmmm that's still a lot lower than mine says average driving in city traffic around here

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    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  2. #2 Re: Horrible gas mileage for my 06 GXP 
    GXP Level Member 91parkave's Avatar
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    im getting about 18 but my avg is on base as well i have a 6mile trip daily but most of it is between 45-35mph and maybe 3-4lights to the house. I was getting very ****ty mileage with that damned dod and out the box tune from diablo but after i got hp tuners and turned off my dod and scaled my MAF freq for my 4' FWI and did a couple of other tweaks my mileage is great.
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