went on a 800 mi round trip, 98% highway, using 93 oct Perf tune from bama and avrg 25.8 MPG. I was surprised, it was the first time taking the stang on the highway so I had no idea what to expect. what are you guys getting on highway stock w/ no tune and w/ tunes. let me know, thnx

 

I drive mine almost all highway driving, and consistently stay around 25mpg, but recently on a longer trip the mpg reading actually made it's way to 28mpg. I took a picture of it to show some co-workers. I have a brenspeed 93 octane tune, c&l intake, and Corsa axle-back mufflers.

 

nice! any idea what highway MPG is stock? i just want to know if it went up with the CAI and tune

 

My 07 GT 5-speed is stock tuned and I get 26-27 highway MPG (using 5th gear a lot). My around town average is 18-20 MPG and overall average is 22.5 MPG.

 

Were you using the data on the dash board or did you figure it out when you filled it up?
Sometimes I wonder how accurate the info on the dash is.

 

It's dead-on accurate, for the most part (maybe a .1 variation or something). There have been several posts in the forums about trip computer vs. pen and paper MPG comparisons and the difference is always negligible.

 

26 MPG? I don't think I have seen that yet, and I'm stock....

 

My dash computer is off by quite a bit. It always reads 3+ liters less fuel consumption then I actually had. ie: 45L computer, 48+ put in tank. Lame.

 

that's cause we don't do "liters" in the US!
Only 2 countries left that won't use the metric system: us and Myanmar! And good luck with your civil rights in both!

Anyway, I drive too hard on the highway to get that kind of average. If I've got to drive 800 miles I should be able to hit 100mph+ several times when the highway clears ahead of me. I'll usually go about 75-80. What was your mph average?

I was wondering, why use such expensive, 93 octane gas for a trip? Can't you detune and use cheaper 87? We don't have 93 in L.A. but just 91 is at least 20-30 cents/gallon more expensive.

 

I get better mpg with the turbo now. When i was driving home for 45minutes i got 33mpg (avg from the computer). hybrid baby! haha

when i get on it i think its like 1mpg [8D]