My 2012 GTCS's fuel economy is sooo bad =( seeking help! - Ford Mustang Forum
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post #1 of 61 (permalink) Old 07-11-2011 Thread Starter
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My 2012 GTCS's fuel economy is sooo bad =( seeking help!

Dear all,

I have been driving my mustang gt cs (2012) for about 3 months and the fuel consumption has really taken a toll on my purse...I find myself filling gas every 5 days and I don't even drive that much.

The car is manual so unless I am doing something terribly wrong, the car is just not very fuel economical.

I live in Canada so we use km/L here, my car's fuel economy is like 6.25km/L which is equivalent to about 14.69 miles/gallon...

I do not drive like a maniac so I wonder why the actual number is so different from the number that ford advertises.

Does anyone have similar problems with their 5.0 ???

I don't think I can afford this car anymore lol....I totally thought it was ok when I saw the window sticker and stuff...the fuel economy seemed fine on paper =(

Any feedback or suggestion would be greatly appreciated, thanks for your time!

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post #2 of 61 (permalink) Old 07-11-2011
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Does something feel wrong with the engine? Are you using the right grade of gasoline?

I always use 93 octane, and my average right now is 20.1mpg. And I'm no light foot. I do care for the car religiously and drive like a grandpa unless the situation calls for otherwise. And I'm not much of a speeder... until the situation calls for otherwise .

Just try keeping your RPMs low, that's what it's all about. Without bogging the engine anyway.


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post #3 of 61 (permalink) Old 07-11-2011
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i drive a v6. but i believe it all depends on how you drive, you may be riding to high in your rpms, or all those launches at stop lights add up and drain your gas. i always ride in as high as gear as possible without the engine wanting to sputter or bogg.

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post #4 of 61 (permalink) Old 07-11-2011
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My fuel economy started off really bad when I first got mine too, but when it starts to break in you will see the efficiency increase a bit. Be sure to follow the manual with the break-in recommendations.

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post #5 of 61 (permalink) Old 07-11-2011
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I've got an auto, and if I'm remembering correctly, the average mpg is 19.6 right now.

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post #6 of 61 (permalink) Old 07-11-2011
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Mine averaged 14mpg city before it hit 1000miles.

After 1k miles, I averaged about 17-19mpg city.

Take time with the break in. MPG will get better.
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post #7 of 61 (permalink) Old 07-11-2011 Thread Starter
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Quote:
Originally Posted by strangelove View Post
Does something feel wrong with the engine? Are you using the right grade of gasoline?

I always use 93 octane, and my average right now is 20.1mpg. And I'm no light foot. I do care for the car religiously and drive like a grandpa unless the situation calls for otherwise. And I'm not much of a speeder... until the situation calls for otherwise .

Just try keeping your RPMs low, that's what it's all about. Without bogging the engine anyway.
I don't feel anything is wrong, I am not really sure because I am not an expert in car mechanics. I use 91 gasoline which should be good enough for mustang gt...my dealer even told me that it works with 87 lol.

I keep my RPM pretty low, I rarely break 3000 RPM, it's usually around 2k rpm. AHHHHHHH what's going on =(
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post #8 of 61 (permalink) Old 07-11-2011 Thread Starter
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Quote:
Originally Posted by lordkoo View Post
Mine averaged 14mpg city before it hit 1000miles.

After 1k miles, I averaged about 17-19mpg city.

Take time with the break in. MPG will get better.
It's already past 1k miles =(
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post #9 of 61 (permalink) Old 07-11-2011
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ease up on the GO paddle and things will get a little better but no one has ever accused a v8 mustang of being very fuel efficient.

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post #10 of 61 (permalink) Old 07-11-2011 Thread Starter
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Quote:
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ease up on the GO paddle and things will get a little better but no one has ever accused a v8 mustang of being very fuel efficient.
Not asking it to be fuel efficient but at least I thought the fuel economy should match...I mean the number claimed by ford compare to the number produced from actual driving.
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We use L/100km not km/L... I have 3.73's and am very heavy on the skinny pedal ( im 22, cut me some slack) i avg about 15L/100km which is aroun 16mpg ( city driving#). If you check your display and it is higher than that, then you have a problem. Between squamish and kamloops i get 10L/100km wiich is 23.5mpg ( pure highway driving #). Hope this helps

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Worst I've been has been 18 L/ 100 (driving aggressively). Best has been 10 L /100 (on the highway). I'm usually around 14 L/ 100. I also have 3.73 gears in a 6-speed manual. I use 87 octane.

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My worst was 28... I got from squamish to horseshoe bay in 12 mins
:smilie op will know that distance and usual time as we are from same area

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I avg 18mpg. 3500 miles with a performance tune.

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To the OP: What is your driving like? Mostly city? Highway?

If you have lots of stop-and-go your fuel economy will SUCK! My driving is almost exclusively rural highways, and I've had great fuel economy out of my 2011 GT!




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