Thread: Better MPG on highway out of a 2000 GTP

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  1. #1 Better MPG on highway out of a 2000 GTP 
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    I accepted a new position for work, and have to start driving my GTP once again (It typically gets 500-1000mi a year of use)

    I am currently getting about 27mpg and was curious on any suggestions, or mods (ubend delete, etc) that might help a bit while on the highway. This is only for a few months until I pick up a
    2nd car as a daily driver for highway use.

    Car is stock with a homemade CAI.
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  2. #2 Re: Better MPG on highway out of a 2000 GTP 
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    27 mpg is up there i have only ever got that on a 4 hour nonstop cruise on drive to madison wi in a NA GP.

    Stay out of boost would be the only tip


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  3. #3 Re: Better MPG on highway out of a 2000 GTP 
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    Thanks. I was figuring it was not too bad for a 18yr old car, but curious if I could squeeze a bit more out of it for the next few months.
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  4. #4 Re: Better MPG on highway out of a 2000 GTP 
    GTX Level Member QUICKSILVER462's Avatar
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    27 mpg is good on the highway, however 30 mpg average is easily obtainable, of course driving habits are the biggest factor in your MPG. I average 30 mpg at around 70-75 mpg, the only modification I have is a front Plog and a ported rear manifold, stainless magnaflow resonator and K & N drop in filter (stock air box), 2000 GTP. I keep my front tires around 34 psi, and 30 psi in the rear. Most of all a steady and smooth foot on the accelerator plays the biggest part for obtaining best MPG.
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  5. #5 Re: Better MPG on highway out of a 2000 GTP 
    Killa Bee Scottydoggs's Avatar
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    id be happy as can be with 27 hwy. your a flat lander, so its not gonna get much better, even with some mods.

    i just got 25 hwy with hills at 70 mph to and from the drag strip last week. i got mods and a tuner, its not gonna get much better for me. not that im complaining about it. thats a respectable number really for the hills i got here.

    and i run my tires at 40 psi all around.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  6. #6 Re: Better MPG on highway out of a 2000 GTP 
    GXP Level Member GTPpower's Avatar
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    Increase tire pressure.
    Remove unnecessary weight from the car.
    Advance timing at cruise. 40-45° gives a nice mileage bump.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  7. #7 Re: Better MPG on highway out of a 2000 GTP 
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    Averaging 28.9 - can't quite past this but not bad....
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  8. #8 Re: Better MPG on highway out of a 2000 GTP 
    Donating Users Bronco Boy's Avatar
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    My drive to work is all freeway, and I see 26-7mpg all day long, cruising around 120km/h (75mph). I do notice that when I keep the speed down to 100km/h (60mph), I see at least an extra 50km (30 miles) out of the tank.
    Chris B
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    ** SOLD ** 2002 GT
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  9. #9 Re: Better MPG on highway out of a 2000 GTP 
    Donating Users Bronco Boy's Avatar
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    Quote Originally Posted by Y2KGTP View Post
    Averaging 28.9 - can't quite past this but not bad....
    I'd be surprised if you can get much better than this.
    Chris B
    2009 CX-9
    ** SOLD ** 2002 GT
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  10. #10 Re: Better MPG on highway out of a 2000 GTP 
    Turbo is the way to go. BillBoost37's Avatar
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    Best thing you can do is look at the terrain and keep the rpm as low as possible w/o bogging in 4th. For example I ended up being relocated for a while into the woods. What this did was put me off the highway at 70-80mph and onto roads that were 40-45mph. I drove 45-55mph and got better mileage than I did at 70+.

    If the terrain isn't hills etc..you can do better by going a bit slower.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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