gas mileage - The Mustang Source - Ford Mustang Forums



2010-2014 Mustang News on the Previous Generation Mustang
Sponsored by: CARiD

gas mileage

Reply
 
 
 
Thread Tools Search this Thread
Old 8/30/17, 11:35 PM   #1
Member
Thread Starter
 
Join Date: August 30, 2017
Posts: 3
Thanked 0 Times in 0 Posts
Question gas mileage

I've only had my little 14 mustang for about 6 months. But I'm only getting about 10 to the gallon! wth??? anybody got any ideas? I'm even thinking about trading her in.
azdiane is offline   Reply With Quote
Join The Mustang Source

Join TheMustangSource.com Today - It's Totally Free!

Are you a Ford Mustang fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford Mustang Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your stang, and have a great time with other Ford Mustang fans. Whether your an old timer or just bought your Mustang you'll find that TheMustangSource.com is a great community to join. Best of all it's totally free!

Join TheMustangSource.com Today! - Click Here JOIN FOR FREE


Old 8/31/17, 05:38 AM   #2
Cobra R Member
 
SpectreH's Avatar
 
Join Date: February 5, 2015
Location: Warner Robins, GA
Posts: 1,980
Thanked 155 Times in 137 Posts
That seems extremely low. My ProCharged 2013 5.0 gets much better than that. How are you checking mileage?
SpectreH is online now   Reply With Quote
Old 8/31/17, 06:40 AM   #3
Cobra Member
 
Bert's Avatar
 
Join Date: January 25, 2010
Location: Massachusetts
Posts: 1,356
Thanked 56 Times in 52 Posts
Just to get this out of the way:
"If you care about gas mileage, you shouldn't have bought a Mustang"

OK, now we can get back to the OP's question and nobody else will need to say that

Yes, that does seem quite low. First make sure you have reset the mileage computer. Preferably, reset the mileage counter at the same time that you fill up the gas tank, and get ready to calculate the mileage the old fashioned way.

(In case you are not familiar: you write down the odometer reading when you fill the tank; next time you fill the tank, you record the odometer reading and the gallons to fill; the gallons to fill is the amount of gas you used and the difference in the odometer reading is the miles you traveled; divide miles by gallons to get miles per gallon)

Once you are confident that the mileage is reasonably accurate, so you won't be chasing phantoms, then look at the potential causes. First things are standard maintenance items: replace fuel filter, replace or clean air filter, clean mass air flow sensor, confirm oil is fresh, etc.
Bert is offline   Reply With Quote
Old 8/31/17, 07:06 AM   #4
Post *****
 
Glenn's Avatar
 
Join Date: August 7, 2006
Location: Lockport il
Posts: 14,218
Thanked 105 Times in 95 Posts
auto trans or manual??
Glenn is offline   Reply With Quote
Old 8/31/17, 08:18 AM   #5
Cobra Member
 
shaneyusa's Avatar
 
Join Date: July 7, 2013
Location: Boise ID
Posts: 1,223
Thanked 81 Times in 69 Posts
Follow Bert's suggestions first. That will let you know if your computer is giving you true readouts.

Does the car have a tune? Does the car have a supercharger? Give us some setup info and we can give you more info back.
shaneyusa is offline   Reply With Quote
Old 8/31/17, 10:46 AM   #6
Member
Thread Starter
 
Join Date: August 30, 2017
Posts: 3
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by SpectreH View Post
That seems extremely low. My ProCharged 2013 5.0 gets much better than that. How are you checking mileage?
ok, yeah i should have said more about her....sorry. First i'm 59, and don't really have that much of a lead foot, I only drive her to work and around town, when I do go out of town, which is only about 100 miles it take almost half a tank! She's a 2014 mustang, not a GT. She has 50,000 on her already but they told me that's like " just getting broken in". The computer tells me at a full tank I only have 235 till empty......is that normal? I've been going by the computer and it tells me I'm getting 19.9. But I have to fill up every week, So I starting to think the computer is full of ****!!........Thanks for replying.......
azdiane is offline   Reply With Quote
Old 8/31/17, 11:06 AM   #7
Post *****
 
Glenn's Avatar
 
Join Date: August 7, 2006
Location: Lockport il
Posts: 14,218
Thanked 105 Times in 95 Posts
maybe unhook your battery for a few minutes to reset everything. Maybe the previous was a lead foot.
Glenn is offline   Reply With Quote
Old 8/31/17, 12:00 PM   #8
Cobra R Member
 
SpectreH's Avatar
 
Join Date: February 5, 2015
Location: Warner Robins, GA
Posts: 1,980
Thanked 155 Times in 137 Posts
You can't judge mileage by looking at the gauge. The only reliable way is to log your miles between to full tanks: Fill up, note mileage (or rest trip odometer). Drive until you need gas and fill it up again. Note mileage (or look at trip odometer). Miles/gallons = your mileage for that tank. Using the car's MTE estimate or looking at the gauge will not be accurate.
SpectreH is online now   Reply With Quote
The Following User Says Thank You to SpectreH For This Useful Post:
azdiane (8/31/17)
Old 8/31/17, 03:21 PM   #9
GT Member
 
dusman59's Avatar
 
Join Date: February 16, 2011
Location: Mesa Arizona
Posts: 162
Thanked 9 Times in 9 Posts
I wonder if she is only drawing from one tank? There was some problems awhile back with this. There are two tanks due to the driveshaft location.
dusman59 is online now   Reply With Quote
Old 8/31/17, 04:08 PM   #10
Member
Thread Starter
 
Join Date: August 30, 2017
Posts: 3
Thanked 0 Times in 0 Posts
two tanks???

Quote:
Originally Posted by dusman59 View Post
I wonder if she is only drawing from one tank? There was some problems awhile back with this. There are two tanks due to the driveshaft location.
wth, i didn't read anything about 2 tanks???????? you guys are messing with me huh????
azdiane is offline   Reply With Quote
Old 8/31/17, 08:56 PM   #11
GT Member
 
dusman59's Avatar
 
Join Date: February 16, 2011
Location: Mesa Arizona
Posts: 162
Thanked 9 Times in 9 Posts
Here is the tank you have. It is connected at the very top but it requires two fuel pumps. The driveshaft runs through the middle between the 2 sides. When you fill how many gallons? I would think if your getting only 10 mpg that would be extreme and that could be hard on the catalytic converters.

https://parts.lakelandford.com/p/For...wd=&origin=pla
dusman59 is online now   Reply With Quote
Old 8/31/17, 11:12 PM   #12
Cobra Member
 
Jazzman442's Avatar
 
Join Date: April 7, 2014
Posts: 1,458
Thanks: 0
Thanked 23 Times in 22 Posts
Are you using E85 gas? Did you buy the car new? Is it a GT?
Jazzman442 is offline   Reply With Quote
Old 8/31/17, 11:36 PM   #13
GT Member
 
fourdegrees11's Avatar
 
Join Date: October 12, 2016
Location: AZ
Posts: 118
Thanked 9 Times in 8 Posts
I thought I was bad getting 16-17
fourdegrees11 is offline   Reply With Quote
Old 9/1/17, 06:13 PM   #14
Bullitt Member
 
Sarge's Avatar
 
Join Date: September 24, 2016
Location: Maine, or eastern Canada
Posts: 235
Thanked 30 Times in 26 Posts
And I've been disappointed that I rarely get more than 30 mpg out of a tank.
Sarge is offline   Reply With Quote
Old 9/1/17, 09:00 PM   #15
EF1
Bullitt Member
 
EF1's Avatar
 
Join Date: September 17, 2013
Posts: 371
Thanked 46 Times in 39 Posts
The only time I get mileage that bad is when I am at the track. How hard are you driving?
EF1 is offline   Reply With Quote
Old 9/2/17, 06:14 AM   #16
Shelby GT500 Member
 
David Young's Avatar
 
Join Date: September 16, 2009
Location: Clinton Tennessee
Posts: 2,993
Thanked 24 Times in 21 Posts
235 miles till empty is 14.6 mpg. Still pretty bad . I have 3.73 rear gears in my v6 and get 19-21 mpg, all in town driving. I also get on it here and there and not trying to get good gas mileage
David Young is offline   Reply With Quote
Old 9/2/17, 08:14 AM   #17
Bullitt Member
 
Join Date: May 10, 2014
Location: New York
Posts: 302
Thanked 11 Times in 11 Posts
How are you driving? Mostly highway, city? You say it's not a GT?

My gas mileage is pretty bad too, I get from 13-15 depending how I drive. I'm in New York City, even when I'm on the highway, it's not really highway driving. It's always stop and go, slow, fast, slow, changing gears, I'm never able to cruise at a constant speed for more than a few minutes to get actual highway mileage.
kanine is offline   Reply With Quote
Old 9/3/17, 06:22 PM   #18
GT Member
 
VIP1's Avatar
 
Join Date: June 11, 2014
Location: Eastern, MA
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
18-20 mpg mixed driving sounds about right. I get that in my 2013 GT Auto. Usually 18 mpg.

I was getting closer to 23mpg driving highway San Francisco to San Diego.

Last edited by VIP1; 9/3/17 at 06:31 PM.
VIP1 is offline   Reply With Quote
Old 9/6/17, 03:24 PM   #19
Cobra R Member
 
kylerohde's Avatar
 
Join Date: September 6, 2011
Location: Kansas City, MO
Posts: 1,778
Thanked 23 Times in 20 Posts
I've never gotten worse than 18 on a tank with my GT, and that tank included 45 minutes of track time at Road America.

Your car is FAR past break-in time so that's not it. My experience driving an automatic V6 Mustang like yours resulted in 25-28 MPG consistently.

As for not being able to trust the onboard computer, that's a bit extreme. In my experience, the onboard computer is within 5% of what I calculate myself.
kylerohde is offline   Reply With Quote
Old 9/7/17, 03:04 PM   #20
Bullitt Member
 
Join Date: May 10, 2014
Location: New York
Posts: 302
Thanked 11 Times in 11 Posts
Quote:
Originally Posted by kylerohde View Post
I've never gotten worse than 18 on a tank with my GT, and that tank included 45 minutes of track time at Road America.

Your car is FAR past break-in time so that's not it. My experience driving an automatic V6 Mustang like yours resulted in 25-28 MPG consistently.

As for not being able to trust the onboard computer, that's a bit extreme. In my experience, the onboard computer is within 5% of what I calculate myself.
What kind of driving do you do otherwise in your GT? When do you shift? Do you stay in a higher gear most of the time? Even with mixed city/highway, I'm only getting 17-18mpg, 13-15 all city. The best I ever had was when I drove from NYC to DC all highway, about 24mpg.
kanine is offline   Reply With Quote
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Featured Sponsors

All times are GMT -6. The time now is 09:45 AM.


2010, The Mustang Source We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.