Thread: gas mileage

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  1. #1  
    I live here. DirtDog's Avatar
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    Lolololol yeaaaa sure I wish it benefited the car more but it don't

    Sent from my pager using Morse code. ... .. ... ....
    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: gas mileage 
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    You use pagers and morse code too?!
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  3. #3 Re: gas mileage 
    GTP Level Member joe0813's Avatar
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    bhahah i get a whole 14 city in my grand prix .... i fill it and the DIC says 250 to empty and i get probably 180 :/
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  4. #4 Re: gas mileage 
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    I've got an 04 Gtp and I get 21-24mpg in city, with my mods and driving like a grandma I love it.
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    I live here. DirtDog's Avatar
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    Quote Originally Posted by Akuch26 View Post
    You use pagers and morse code too?!
    Been using this pager for awhile now

    Sent from my pager using Morse code. ... .. ... ....
    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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  6. #6 Re: gas mileage 
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    i usually get 18.3-19.7 in my gtp according to the dic but i think it should be higher then that since i usually set the cruise to 74-75 on the highway
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  7. #7 Re: gas mileage 
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    Average around 28 mpg in the summer cruisin and 20 city. Winter has been like 17 city and 24 highway.
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  8. #8 Re: gas mileage 
    SE Level Member Comanche1959's Avatar
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    I haven't replaced my plugs in about 60K miles. My town-country driving has dropped down to 21.3 avg. Wonder what inprovement plugs would bring?
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  9. #9 Re: gas mileage 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Car says 150 miles on this tank and my low fuel light on the DIC came on 3 days ago.

    So that like 11 mpgs, also been 2 weeks since my last fill up. I bet almost half this tank was burned through idle time because its cold outside and I dont give a **** about fuel economy.

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  10. #10 Re: gas mileage 
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    I guess I see the benefits of the SE...

    I get between 24-26 average.
    Usually around 22-24 all city driving.
    I get 28-30+ highway depending on cruise. I got 33.4MPG on an overnight trip from Atlanta once when I had cruise set to 64.

    Thats why I love my 3.1L.
    Stock 2000 Grand Prix SE 3.1L - DD
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  11. #11 Re: gas mileage 
    GT Level Member PontiacL32's Avatar
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    I average 19-20 MPG city in the winter with 10 mins of warm up every morning.

    2005 Grand Prix GTP, 170,000 miles. Speed daddy headers with no cat, cone intake, MSD wires, flipped dog bones, transgo shift kit FOR SALE.
    2004 GTO six speed, stock for now.
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  12. #12 Re: gas mileage 
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    My 98 GTP is getting 27 highway, and about 20 city with 198k on it, and my 08 GXP is getting about 21 Highway (kind of a stretch) and City is about 16.
    My Grand Prix Current and Past, 08 Grand Prix GXP, 04 Grand Prix GTP, 98 Grand Prix GTP, 02 Grand Prix GTP, 98 Grand Prix GT, 89 Grand Prix SE
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  13. #13 Re: gas mileage 
    SE Level Member harner's Avatar
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    I've been getting about 19-20MPG consistently in my '98 GT since I now had OD again. 20MPG is with more highway than normal. Not too impressive, but cheaper than my TBSS and I can run 87.
    1998 Grand Prix GT Sedan - SOLD

    10 Camaro 2SS/RS | 94 TA | 87 IROC | 06 Silverado 1500
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  14. #14 Re: gas mileage 
    GTP Level Member joe0813's Avatar
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    my mpg sucks.... i only get 12 what the hell
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  15. #15 Re: gas mileage 
    SE Level Member Kikasscuda's Avatar
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    my mpg also sucks, i get approx 17.7 mpg, and if the specs of my car are right and i have a 18 gallon tank, when 13.5 gallons are used its on the line of E, i also dont have overdrive so it only goes up to 3rd gear which is a gas killer, thankyou GM for not making our 4th gearclutch hardened, we're reaping the benefits of our 4th gear splines after 120k
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  16. #16 Re: gas mileage 
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    I've been average 15 or so on the DIC all city in my 2002 GTP. While it has been reasonably cold, should I be checking for problems? Or is this par for the course?
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  17. #17 Re: gas mileage 
    Donating Users smitz327's Avatar
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    15 around the city is pretty good but remember the DIC is not very accurate. A good test is on the open road with cruise on then you will know for sure
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  18. #18 Re: gas mileage 
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    Quote Originally Posted by smitz327 View Post
    15 around the city is pretty good but remember the DIC is not very accurate. A good test is on the open road with cruise on then you will know for sure
    15 is bad

    It's like for every 18 minutes drive you pay 3.79
    Grand Prix gt 1999 v6 3.8L coupe.
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  19. #19 Re: gas mileage 
    Donating Users smitz327's Avatar
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    Stop and go traffic? 15 to 18 is very good mileage around the city. My car gets very good gas mileage on the highway, maybe 29 highway but around town stopping at stop signs and lights, I am lucky with 15 to 18 MPG and no lead foot either. One thing I have noticed, the car has to get up to temperature, My car doesn't get up to temp because I am only driving maybe 2 miles one direction
    Last edited by smitz327; 02-24-2013 at 03:16 PM.
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  20. #20 Re: gas mileage 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    I wouldnt worry.

    I just hit 125 miles on this tank, already used 10.8 gallons and just hit the 1/4th tank mark. I drive all city, less than 7-8 miles most days. I bet I waste half my tank from idle time.

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