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5.0 GT Gas Mileage

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Old 07-25-2013, 11:44 AM   #1
Shane780
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Default 5.0 GT Gas Mileage

Hello,

I am the very happy owner of a 2013 Mustang GT. Automatic sterling grey.
These are my best gas mileage results with a kn drop in filter, at 97 km/hr.

30.9mpg.

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Old 07-25-2013, 12:12 PM   #2
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That is some nice MPG.. although gotta ask how the hell do you manage to keep your '13 under 100km/hr lol

I think I have the heavy foot syndrome lol

my bests were 9.5l/100km (24.7 MPG) doing 115km/hr (cruise control) and making a fair amount of pit stops since i wouldnt let my friend smoke in my car. This was when I had the Bama 91 Performance tune in (before xpipe and cat deletes aswell)..

now with running the Bama 93 Race tune with the xpipe and cat deletes havent taken it on a huge trip like I did before but on a trip half the size and doin 130km/hr I still averaged 11.5l/100km (20.5MPG)

Even tho most dont buy a mustang for its MPG its extremely hard not to talk about what great MPG you get with a car pushing 400+hp
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Old 07-25-2013, 12:29 PM   #3
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To be perfectly honest, ive been there and done the whole drag car thing. I love being able to pass anyone with ease, well except supercharged 5.0s and some ferraris. I love the v6 I think its awesome, not wanting to tick anyone off but I have never seen a 6 cylinder stang other then a shelby hold its value for any length of time. Reason why I chose an automatic v8.

The 5.0 Gt Auto has some flaws.

1.throttle response = lol.. oh oh wait for it now it kicks in.
2.take off = squat then go. should be just go.
3.quiet = should make all men giggle

Number 1 fix= air intake,throttlebody,exhaust,tune. (Maybe coils packs ?)
Number 2 fix= control arms,drag radials,3.31 gears,carbon fiber driveshaft
18lb tsw rims.
Number 3 fix=complete fix 1 and 2.

All of these with the right tunes ie one for gas mileage one for performance,should reach these goals.

Number 1 fix happens this month
Number 2 fix in the spring
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Old 07-25-2013, 01:05 PM   #4
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I am lucky to break 19 mpg, but my car came with 3.73 gears. On my trip from VA to Florida, I managed about 22.8 mpg I believe. If I went down to 65 mph, I could probably get 24 mpg or so. My GTO did much better on the highway.
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Old 07-25-2013, 01:17 PM   #5
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at 97km hr im sitting at 1500rpm. the 3.31 ratio should put me up a little higher, i believe the car will actually get better mileage at that ratio, having slightly more torque from the ratio and from being in a slightly higher rpm. I don't know what that rpm will be exactly. Im guessing should only be 1600rpm in 6th due to the overdrive. I have the 3.15s and 19inch 245/45/19 perreli all season tires.
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Old 07-25-2013, 02:39 PM   #6
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Quote:
Originally Posted by Shane780 View Post
To be perfectly honest, ive been there and done the whole drag car thing. I love being able to pass anyone with ease, well except supercharged 5.0s and some ferraris. I love the v6 I think its awesome, not wanting to tick anyone off but I have never seen a 6 cylinder stang other then a shelby hold its value for any length of time. Reason why I chose an automatic v8.

The 5.0 Gt Auto has some flaws.

1.throttle response = lol.. oh oh wait for it now it kicks in.
2.take off = squat then go. should be just go.
3.quiet = should make all men giggle

Number 1 fix= air intake,throttlebody,exhaust,tune. (Maybe coils packs ?)
Number 2 fix= control arms,drag radials,3.31 gears,carbon fiber driveshaft
18lb tsw rims.
Number 3 fix=complete fix 1 and 2.

All of these with the right tunes ie one for gas mileage one for performance,should reach these goals.

Number 1 fix happens this month
Number 2 fix in the spring

Don't mess with the coils or throttle body. Ford has made those pretty rock solid and unless you plan on tricking out the motor they should be left alone. If you do trick out the motor, only upgrade the throttle body with a FRPP one.
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Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 07-25-2013, 03:59 PM   #7
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Default throttlebody

Ill be installing the accufab 84.5mm unit which is the same as the frrp throttlebody but much cheaper, just doesnt have the ford logo, nor do I have to rewire the throttlebody connector like the ford racing 84.5mm unit as per its instructions, makes going back to stock harder. Im going for the horsepower numbers off of the american muscle bama tune and the jlt intake is similar to the air raid that they used on their 2013 test car. I will also have gt 500 catback exhaust and the throttlebody over and above the american muscle build. Which should reach my goal of 400 rwhp.
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Old 07-25-2013, 05:01 PM   #8
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Skip the intake, skip the throttle body, and skip the coil packs. You want to wake up your auto? Tune and exhaust first and then a converter.
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Old 07-25-2013, 05:18 PM   #9
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Only if I had a shop willing to install the longtube headers, i would have them. The jl intake and throttlebody I already have, just waiting on my tune.
A 3000 stall circle d converter seems like it would wake the car up. But might be noisy for a daily driver. I may actually drive someplace and have the headers installed if i can find a reputable shop.
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Old 07-25-2013, 06:56 PM   #10
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Huh I get between 12.6 and 14 if lucky with all the traffic in Seattle I spend to much time in second gear.

On the note of squat get some nice aftermarket upper and lower control arms that will fix that problem. Stock ones leave a lot to be desired.
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Old 07-25-2013, 07:44 PM   #11
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I've gotten 28ish a couple times cruising at 70mph, got 25mpg the other day driving 350 miles, and today I got 22mpg averaging 85mph over a 140 mile trip (hit 130mph a couple times and was regularly above 100mph). Also, last tank I got 22.5mpg with two runs to the governor (the rest of the tank was about 80 miles cruising at 70mph and 160 miles city driving). Can't complain about that at all

Purely around town is another story though...I drive aggressively and get about 12-14mpg
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Old 07-25-2013, 11:36 PM   #12
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Are we talking imperial or US gallons? 40 oz in an imp gal vs 32 in a US gal.
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Old 07-26-2013, 09:40 AM   #13
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Personally I'm talking US gallons b/c, despite how much I hate how our units of measure are different than 98% of the world, that's what we use where I'm from. Also, I think there are 128 ounces US in a US gallon, and somewhere around 150 ounces US in an Imperial gallon
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Last edited by sweger; 07-26-2013 at 09:43 AM.
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Old 07-26-2013, 10:01 AM   #14
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Quote:
Originally Posted by Shane780 View Post
Hello,

I am the very happy owner of a 2013 Mustang GT. Automatic sterling grey.
These are my best gas mileage results with a kn drop in filter, at 97 km/hr.

30.9mpg.

Click the image to open in full size.
This fuel mileage crap is getting old. No one buys the GT for fuel mileage.

Make it loud, bolt-on a little HP, fix the suspension, and drive the **** out of it! Enjoy having a permanent smile on your face when you're driving your Mustang GT properly.
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Old 07-26-2013, 10:07 AM   #15
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Quote:
Originally Posted by BrazenStang View Post
This fuel mileage crap is getting old. No one buys the GT for fuel mileage.

Make it loud, bolt-on a little HP, fix the suspension, and drive the **** out of it! Enjoy having a permanent smile on your face when you're driving your Mustang GT properly.
What he said!

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Old 07-26-2013, 11:19 AM   #16
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If you take a moment and read hes not complaining about it.
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Old 07-26-2013, 02:20 PM   #17
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Quote:
Originally Posted by Shane780 View Post
Ill be installing the accufab 84.5mm unit which is the same as the frrp throttlebody but much cheaper, just doesnt have the ford logo, nor do I have to rewire the throttlebody connector like the ford racing 84.5mm unit as per its instructions, makes going back to stock harder. Im going for the horsepower numbers off of the american muscle bama tune and the jlt intake is similar to the air raid that they used on their 2013 test car. I will also have gt 500 catback exhaust and the throttlebody over and above the american muscle build. Which should reach my goal of 400 rwhp.
Do what you want, it's your car, but you have been warned. You get what you pay for.

Remember the golden triangle, Cheap, Fast, Reliable. You can only get two and Cheap and Reliable exclude each other.

There are a few examples of people on the forum that have made the mistake of installing an aftermarket TB that is not FRPP (after similar warnings) and later come on to complain about problems they are having.
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Quote:
Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 07-26-2013, 02:21 PM   #18
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My gauge never goes up 20 even with all my highway driving, so I must be driving it right.
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Old 07-26-2013, 02:35 PM   #19
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Quote:
Originally Posted by BrazenStang View Post
This fuel mileage crap is getting old. No one buys the GT for fuel mileage.

Make it loud, bolt-on a little HP, fix the suspension, and drive the **** out of it! Enjoy having a permanent smile on your face when you're driving your Mustang GT properly.
Definitely not a major factor in my purchase, but a ver nice bonus to be getting 26-28mpg on the highway because, despite what everyone on here seems to believe, spending money on gas isn't fun, even if it is an extremely fun car to drive flat out. That being said, I traded a '13 Mazda CX5 that was rated at 31mpg highway (and we never got over 29mpg in it mileage was a factor in buying that, since we traded a 2010 F150 supercrew for it) for the Mustang and mileage wasn't a concern with the trade in (after my insurance and monthly payment decrease, we pay about the same a month with the much worse city mileage).

Some people might actually buy the Mustang over a Camaro, Challenger, etc. because it gets better fuel economy though.
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Old 07-26-2013, 02:36 PM   #20
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Quote:
Originally Posted by kawasakiguy View Post
My gauge never goes up 20 even with all my highway driving, so I must be driving it right.
Where in KS ya at? I'm in Wichita for the weekend and hitting the KID tonight
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Old 07-26-2013, 02:36 PM
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