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Old 05-18-2008, 09:04 PM   #21
cdawg
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Default RE: 08 GT Mustang Gas Mileage

I get better in the city than I thought I would (17-19), but worse on the highway than I thought I might (22-24). A couple of things I noticed on highway mpg, these cars are severely affected by wind. Going against the wind (wind avg of 20mph) drops the mileage 2-3 mpg, going with the wind at the same speed only increases it a mpg or two. Also, running the air conditioner drops the mpg at least 1-2 mpg.

And my computer has been spot on, taking almost exactly the amout to refuel as it says the car has used.
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Old 05-19-2008, 03:05 AM   #22
Orion_240
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Default RE: 08 GT Mustang Gas Mileage

Quote:
ORIGINAL: Nuke

Wantsa Stang GT and wants better gas mileage... Sounds like a conflict of interest.

My Stang gets about 23 MPG, average, with about 95% highway and spirited driving. It gets about 3-4 MPG better than my SUV does so I'm happy. I suppose it's all a matter of perspective.
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Old 05-19-2008, 03:11 AM   #23
MustangFan45
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Default RE: 08 GT Mustang Gas Mileage

I get about what my sticker said I would. Depending if I play a lot or not.

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Old 05-19-2008, 03:28 AM   #24
PhattyDre16
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Default RE: 08 GT Mustang Gas Mileage

Wow some of you guys are getting HORRIBLE gas mileage! I have 3.31s, K&N CAI, and Steeda Underdrive pullies andI average 22 mpg with mostly city and some highway. I used to average about 18-20 mpg but after I installed the pullies, it shot up to 22. Awsome!
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Old 05-19-2008, 03:43 AM   #25
uluafishing
 
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Default RE: 08 GT Mustang Gas Mileage

Did my first fill up today.

Looks like I'm getting 19 mpg...combined driving 50/50 hwy & stop/go traffic. 08 GT 5spd w/ 3.55's
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Old 05-19-2008, 04:11 AM   #26
08Eleanor
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Default RE: 08 GT Mustang Gas Mileage

ulua, do you drive conservatively or rather aggressive. I am somewhat aggressive but not too bad and like I said before, I get 14 mpg, but then again, that is what my trip computer says, not calculated.
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Old 05-19-2008, 07:47 AM   #27
1morepart
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Default RE: 08 GT Mustang Gas Mileage

in town, about 18....hw, about 23......but i have 4;10's and other "stuff"

averages 19mpg using the pen and paper and not the dash display!
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Old 05-19-2008, 08:37 AM   #28
jdmcbride
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Default RE: 08 GT Mustang Gas Mileage

My performance mods also increase fuel efficiency...

Underdrive Pulleys - less parasitic loss from the accessories
Aluminum Driveshaft - less rotational mass in the driveline, 35 lbs lighter
Axle-Back Exhaust - supposedly increases gas mileage by relieving back pressure on the exhaust - I don't know if I believe that one but it does sound great!

I noticed an increase of about 2 MPG on the mods above. Not bad considering the increase in acceleration they provide!

I just added the Steeda CAI with the high-flow elbow and Brenspeed's 87 tune this weekend. I will report back if this mod also increases efficiency, but it hard to stay out of the gas!

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Old 05-19-2008, 10:02 AM   #29
SonicBlue05GT
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Default RE: 08 GT Mustang Gas Mileage

Quote:
ORIGINAL: jdphillips73

just buy a v6 with a tune cai...its as fast as that 02 gt you have now....and drive it gently and you will see almost 30mpg on the highway. Not to mention, saving the 5-7k from not buying the gt. jmo..
since when does a V6 with a tune and cai make 260+HP at the crank?!
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Old 05-19-2008, 10:48 AM   #30
mud mountain
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Default RE: 08 GT Mustang Gas Mileage

My 07with manual and3.31s was getin around 20 mpg when I first got it ( I played with it more ) but Im getin consistant 25-26 mpg just goin back and forth to work combined hiway and country roads. Iwas thinking abouta cai and exhaust , since some people aregetin beter mpg I may do it sooner than later
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