Thread: Getting horrible MPG any advice?

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  1. #1 Getting horrible MPG any advice? 
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    Bought a 2004 GT2 with 117K miles from a body shop last week and Im noticing that Im only getting about 18 MPG driving 70 MPH on average. A few things worth mentioning, the car was in a collision and i believe the gas cap has been replaced, there are 4 different tires on the car (all with the same wear), It only takes about 8 gallons of gas before the nozle clicks then I have to wait a few seconds to get another gallon or so in, Ive tried oil change, getting the fuel injection cleaned, tires ballanced/rotated/inflated to 33 psi, my battery only reads 200 out of 800 cold crank amps.

    Im taking it to a mechanic tomorrow. Which areas do you think I should have him check to narrow the search?
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  2. #2 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    18mpg isn't bad is that city or hey? I would do a basic tune up.
    Last edited by REDCRAPGP; 05-08-2013 at 08:49 PM.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  3. #3 Re: Getting horrible MPG any advice? 
    Moderator dsmuts's Avatar
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    Yep tune that thing up.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  4. #4 Re: Getting horrible MPG any advice? 
    GTP Level Member smoke14's Avatar
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    New plugs, wires, air filter, and most important, bad driving habits.
    "You know, all that really matters is that the people you love are happy and healthy, everything else is just sprinkles on the sunday."

    -Paul Walker
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  5. #5 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    And fuel filter
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  6. #6 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    And clean the TB and MAF
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  7. #7 Re: Getting horrible MPG any advice? 
    GXP Level Member Timing's Avatar
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    hai
    plugs,wires
    fuel filter
    pcv
    seafoam
    clean tb and maf

    also o2 sensors arnt a bad idea if they have never been done
    08 MazdaSpeed 3- Treadstone tr8l, Ebay Piping, Ported intake,Thermal gasket, Cs Injector Seals,Cobb intake/inlet, Autotech Internals, Poly mounts, Speed Daddy DP, Magnaflow CB,
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  8. #8 Re: Getting horrible MPG any advice? 
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    Thanks for the tips guys. 80% of my driving is highway. How much would you guess a basic tune up would cost?
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  9. #9 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Considering everything that was listed so far...I wouldn't let a mechanic touch it I would do it yourself and you'll only be looking at $100-250ish in parts. If The mechanics ends up doing l wouldn't be surprised if you end up paying at list $500ish.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  10. #10 Re: Getting horrible MPG any advice? 
    GTP Level Member gpse2000's Avatar
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    Quote Originally Posted by smoke14 View Post
    bad driving habits.
    True that
    I would rather rock 15 in a car instead of getting 6 in a truck hence the reason why I drive a car
    2002 Denali Airaid MIT, Tint, 121k GARNET RED
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    2000 SE 3.8 intake, dic swap, debadged, flipped mounts, rust mod 140k SILVERMIST SOLD
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  11. #11 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Depends on the truck lol. In my pops 08 silverado that I drive meanwhile until I decide to put my junk back together I get better gas mileage then the GP ever did
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  12. #12 Re: Getting horrible MPG any advice? 
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    what does your pops 08 silverado get for gas mileage??
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  13. #13 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    I want to say last time I really watched it on avg around 18 or so with mix driving. actually I think the GP got around that or so.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  14. #14 Re: Getting horrible MPG any advice? 
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    Dang my GP doesnt get that much better (22 mixed). Probably the Active Fuel Managment found in some of those GM V8's. My uncle tells me his truck with that can run on only 4 cylinders sometimes
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  15. #15 Re: Getting horrible MPG any advice? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Yup I believe that what it is..I was quite surprised myself. One of the reasons I don't mind driving it plus the fact that I don't have to constant look out for crap in the road I can just run over it unlike with the GP.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  16. #16 Re: Getting horrible MPG any advice? 
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    I miss my S10 Blazer for the same reason lol but I picked up my GP for the better MPG.
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