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mpg question

This is a discussion on mpg question within the GTO forums, part of the Vehicle Specific category; whats the difference in mpg between a 5.7 goat and a 6.0? im gettin around 11 on my ls2. was ...

  1. #1
    Junior Member
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    May 2007
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    El Dorado Hills, CA
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    mpg question

    whats the difference in mpg between a 5.7 goat and a 6.0? im gettin around 11 on my ls2. was wondering wat u guys with the ls1 r gettin, and ls2 guys. thnx

  2. #2
    o4goatman
    Join Date
    May 2007
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    Illinois
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    87

    red
    04 gto A/T

    Is ur stick or automatic? Mine is a/t i was getting around 13 mpg in the city but since my modification averaging 9.8 mpg city & up to 22 mpg hyway. Modificatiopn:comp cam, spring,titanium retainer, 7.400" pushrod, off road headers, 2800 stall torque converter.

  3. #3
    doesn'tplaywellwithothers superchargedblackgto's Avatar
    Join Date
    Jan 2007
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    Mayberry....(Indiana)
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    1,634

    Black
    2004 GTO

    I have an m6....don't really know what I'm getting never really checked it.....I know it's worse than that.....can't keep my foot out of it and didn't buy it for gas mileage....If I was worried about gas I would have bought a ricer....lol
    '04 gto M6 slp ceramic coated headers,B&m sport shifter,harrop cover,3.5"aluminum BMR driveshaft, BMR axle stubs, BMR Half shafts, BMR SFC's, loudmouth2 exaust,90mm FAST T/B,Magancharger(high helix upgrade)......other misc. suspension,Cross drilled, slotted rotors. Meth Kit, spraying @ 3psi and up

  4. #4
    Junior Member
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    ive got an m6, highway i get around 20. definatly right about the ricer comment lol.

  5. #5
    Senior Member GOT1GOAT's Avatar
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    Sep 2006
    Location
    Newcastle,De.
    Age
    60
    Posts
    1,048

    04 GTO QuickSilver
    95 MarkVIII wifey white

    Last week I took it on a 200 mile round trip and averaged 24 on the highway with cruise on 65 mph.
    The best I've gotten since my predator tune.
    I wouldn't even try to calculate city because of my lead foot.
    04/A4 Quicksilver
    Magnflow catback-Resonator delete
    K&N drop in
    SAP front Grills and 05 hood
    Limo tinted windows-Gets me pulled over alot
    Diablosport Predator (RWTD) tune.

  6. #6
    Member
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    Jun 2007
    Location
    loyall ky
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    347

    black, and black
    04 M6

    mileage

    ive got as high as 27.3 on highway, and i get about 16 in city but this is with a M6 and using the cags lol its hard to do but i stay out of it most of the time,

  7. #7
    Member ultra_badass's Avatar
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    Mar 2007
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    Corpus Christi
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    257

    navy blue matallic
    2000 WS6 trans am M6

    i get 20 in town and 27-30 on highway 75-80 and i dont stay off of it

  8. #8
    o4goatman
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    May 2007
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    Illinois
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    red
    04 gto A/T

    gas mileage

    You get 20 in city abd u don't stay off the pedal , I don't believe it. What is you're mods on the car?

  9. #9
    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    all stock i couldnt believe it either but thats the truth

  10. #10
    o4goatman
    Join Date
    May 2007
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    Illinois
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    red
    04 gto A/T

    Awesome, I wish i had that kind of mileage before modifications. If i was , even after mods i would least get 15 mpg. Does anyone out there have a similiar mods ? if so what is ur city driving mpg under normal driving? i'm getting 9.8 mpg i think before mods i was getting 13-15 mpg. modifications: comp cam intake 222 exhaust 224(little bigger than factory cam), comp cam 7.4" pushrod,heaver spring w/titanium retainer,2800 stall torque converter,throttle body coolant bypass and off road stainless works headers w/flowmaster from cat. back.

  11. #11
    Junior Member
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    Oct 2006
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    south of the border
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    44

    Silver
    2004 GTO

    I got 22 mpg on my drive back from Houston after the cam install and 24 mpg on the way up with just headers, CAI, and no tune
    2004 GTO M6
    Silver/Red
    K&N CAI
    Kooks LTs w/ Cats, SLP LM 1
    CCW SP500 18X10, 18X8.5, Kuhmo 275/35, 245/40
    GMM Ripshift
    Powerbond UD Pulley
    FTI Rebel TQ Cam



  12. #12
    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    i missed 1 thing i do have a borla cat back

  13. #13
    Member
    Join Date
    Aug 2005
    Location
    Mississippi
    Posts
    222

    Impulse Blue
    2004 GTO

    Best I've gotten was 31mpg on one tank doing 70mph. It was averaging 33mpg at 55 though. That was with lean cruise enabled. It usually got 23-25mpg mixed driving.

    With the latest round of mods, 27mpg seems the best it'll do now. With an average of 21-23mpg in mixed. Still not too shabby for over 430 to the wheels
    Rob
    04 GTO
    96 WS6

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