I am not racing it...
Already talked to my Lemon Law attorney...you can not Lemon a car due to poor Gas Mileage because there will always be the shadow of a doubt that it is user error and you can not present that it court/arbirtations.
Car is stock...did not want to mod the car in case the dealership wanted to blame the problem on what I changed to the car...had only for almost 6 weeks now...been in the shop for over a week of that time.

 

Problem is that this car drives at a low RPM as it is.... I can be driving 55MPH constant speed @ 1500RPM's once I am already at that speed....I would have to stomp on the gas since I have an Auto and can not short shift...in a 45mph zone in order to get it to be in 5th gear while cruising at 45mpg

 

This car has a 16gallon tank...if your car is telling you that you have 216miles till empty that equates to 13.5mpg. Also I do not have the Info center from the IUP.... I am doing the math from real numbers (i.e. Miles driven/gallons put in)

 

tyr turning off the overdrive to get the rpm's up a little while cruising

 

or just pick a night and drive out somewhere - circle the bay - or head out 75..

 

I know I am quoting myself here...but an update of what I was told now. spoke with the service manager and he told me my only two options are either trading it in and getting another car, which I would have to pay more for...or Lemon lawing it. I don't see how this is possible for FoMoCo to do when I have had these problems along with many others (Vert rattleing, twice for serious wind noise from rear driver side window while driving 40+MPH, Moisture in front headlight, seat material wear when purchased, paint chips when purchased, thump in rear when hitting bumps even with nothing in trunk, driver side molding coming loose around vert/door) since day one. The sales manager sid that all GT mustangs only gets 13-16MPG... and I told him that people on this forum and a friend of mine are getting 18-20MPG per tank...and he said that is BS.

What do you guys think I should do....any viable options to actually getting this taken care of instead of all these hoops I have to keep running through?

 

Last time I drove from my house to clearwater and back my car used a half of a tank of gas.

 

I was doing some experiments and actually found I got better mpg driving it more "spirited" than I did trying to baby the gas. I did the same experiment over and over because it seemed completely counter intuitive, that the gas consumption would go down driving it harder. I even posted my (albeit rather unscientific results) either on this board or another. I thought I was just nuts.

My hypothisis was that the fuel map could get into econo mode faster by getting up to cruise speed quickly, therfore increasing fuel eficiency by maintaing a steady speed longer. But not having any knowledge of how fuel mapping works or really how any of the techie stuff works I didn't really have a solid argument to support my theory.

Maybe I'm not nuts after all.

Btw, I think 13-16mpg around town in reasonable assesment of average mpg in stop and go city driving. I manage 19-21 mpg all open highway driving. Others MPG will vary depending on fuel and other conditions IE altitude, weather ect.

 

No more talking to that guy.


What I find really amusing is this guy's own service techs say they got around 20 when they hooked the car up.

 

Do you enjoy your car when using it?? Do you enjoy going into your garage at night, and just gleem away at it?? Do you enjoy the looks your GT/CS gets while cruising?? Do you enjoy the performance of it??

If you did not answer yes to any of the above, then trade it in on a V-6. You can get the same color options, a shaker sound system, and even baby fog light's too. Then you'll be guaranteed the mileage you seem so desperate to attain.

 

Engine load is the big factor in MPG not just RPM. That’s why cursing on the highway at say 2 grand uses less fuel then stop and go city driving. You use a lot of gas to get the car moving only to stop again. Sorry for stating the obvious.

The sticker states between 14 and 20 MPG for your car in the city and 21 to 29 MPG highway. Fill up the tank take a long highway drive (no speeding) and if you’re still getting 13 MPG document it and call the attorney. If it was mine I’d just put a supercharger on it, you might get better mileage, who knows at least you’ll have a smile on you face on the way to the gas station.

-Wayne

 

I would like to see the results of your experiment.... I love the fact that you would have to step on the gas to get better MPG...just sucks if that is the case...because to stomp on the gas just to get it to the cruising speed sucks....esp when you are driving a car that gets the attention of all the cops around you, I have yet to speed in this car but yet I seem to be followed by cops as it is everywhere I go checking my tag to see if they can pull me over for something, just because of the conotation that comes with a mustang.

 

Screwit .... I am tired of talking to these stupid managers and FoMoCo....I guess I will just keep the car and shell out the money for a CAI/Tune and Exhaust and hope that it helps my MPG.

 

leave the car with me for a day or so - fill up the tank - and i will perform a proper test and report the results to all

 

i have a 05 gt vert and driving it around town the mileage sucks; i think it is the heavy foot and the start and stop driving; on the highway it is anywhere between 21 and 25. You just got to learn to live with it; now your other problems - i would have a concern with, i have 2 years trouble free except for having a new rear end one month after purchase.

 

My recommendation is to clearly document your fuel consumption and driving mix (city/highway) over the next 1500 miles of driving, noting the temperature and weather conditions. Getting an aftermarket tune before you are clear on whether or not there is an issue might not necessarily improve your situation.

Also, I suggest getting a dyno to check the air/fuel ratios over the RPM band.

Last, I think you are going to have to work with another dealer to get beyond where you are at now.

As a benchmark, I typically get somewhere between 225-240 miles using about 14 gallons with a 60/40 mix of highway/city driving and running the engine into the 5000 RPM range before shifting. I have a manual, so the results might be different compared to your expected outcome.

Take some more time with this before you go spend $300-$400 and increase the likelihood of invalidating your warranty.

Good luck!

 

Don't forget to add the X-pipes with the FRPP GTA mufflers!

 

I did not see an increase in fuel economy after instaling a tune and intake.

My results where not gained by nailing the throttle but accelerating briskly, nothing illegal, no "exibition of speed". I also averaged only ~1 mpg improvement in city driving. Granted, where I live you get a stop light almost every block and the speed limit ranges from 40-45 on most surface streets, so your results could be better. Even my Honda civic only managed 18 MPG in my driving enviroment.

 

16 gallons? When I first read that, I was sure you were high. But I checked my owners manual, and sure enough, it says 16 gallons.

I have never ever put more than 13.6 gallons in it, and that was with the computer telling me I had 5 miles until empty. Guess I was never as close to running out as I though.

I've owned 2 S197 GT's, an '05 and an '07, and same thing, when the needle's on E I put in around 13 gallons. I've always thought this car had a 13.5 gallon tank.

I drive mixed street/highway miles on a 14 mile commute, and in the summer have the AC on max, and I've always been getting at least 15mpg, usually around 17. And I do make it a point to occasionally test the pedal-floor boundry, to make sure it's still solid. Would'n't want the pedal to go through the floor accidentally.

I think you should take the guys up on their offer to make the same highway trip with a couple other cars, and compare what everyone gets.

Good luck.

 

except if you get a group together - you may have even more 'spirited' driving