2010 Ford Mustang GT MPG!

[londi1tagaholy]

Hi, i recently bougt a GT 2010 Mustang and im kinda disappointed about the city milage. I believed it was advertise as 18 but ive been getting 14. Any suggestion? i didnt put any mods on it except Flow master muffler. Thank you and have a great day

[nhcowboy]

Originally Posted by londi1tagaholy

Hi, i recently bougt a GT 2010 Mustang and im kinda disappointed about the city milage. I believed it was advertise as 18 but ive been getting 14. Any suggestion? i didnt put any mods on it except Flow master muffler. Thank you and have a great day

City only (without any highway) will kill your mpg... Especially if you drive like a mustang should be driven. You might be able to get a tune that is tailored to increase mileage, but performance will suffer.

If it makes you feel better, I average 12.

[Barricade]

I average 20mpg but mixed some city some highway.. And I have a really heavy foot lol

[elnegro5.0]

I've been averaging about 18 mpg. All of mine are hwy, doing about 80 mph. Can some one Tell me if that is normal for the winter weather.

---------- Post added at 02:29 PM ---------- Previous post was at 02:28 PM ----------

I have a 2011 Gt/CS

[Barricade]

Yes that is normal.. That's pretty close to what I average

[nosympathy]

Originally Posted by elnegro5.0

I've been averaging about 18 mpg. All of mine are hwy, doing about 80 mph. Can some one Tell me if that is normal for the winter weather.

---------- Post added at 02:29 PM ---------- Previous post was at 02:28 PM ----------

I have a 2011 Gt/CS

that is what I have been getting. When it was warmer out was right about at 20.

---------- Post added at 03:45 PM ---------- Previous post was at 03:44 PM ----------

Originally Posted by londi1tagaholy

Hi, i recently bougt a GT 2010 Mustang and im kinda disappointed about the city milage. I believed it was advertise as 18 but ive been getting 14. Any suggestion? i didnt put any mods on it except Flow master muffler. Thank you and have a great day

what gearing do you have? I actually got worse street MPG when I had 3.31 gears than the 3.73 gears I have now.

[Martysmustang62]

I get 20 mpg in warm weather and18 mpg now in Wisconsin. Driving a 2010 gt that has flowmaster mufflers and not tuned. It is what it is after all, a powerful Mustang. Enjoy the drive

[tgmeyer]

Originally Posted by elnegro5.0

I've been averaging about 18 mpg. All of mine are hwy, doing about 80 mph. Can some one Tell me if that is normal for the winter weather.

---------- Post added at 02:29 PM ---------- Previous post was at 02:28 PM ----------

I have a 2011 Gt/CS

After 65+ your mileage starts going downhill.

[nosympathy]

Originally Posted by tgmeyer

After 65+ your mileage starts going downhill.

don't agree, I get better gas mileage at 80 than I do 65. At least with my drive from Cinncinnati,OH to Florence Ky I make to work 4 days a week.

I have tested this. Did a day where I reset MPG and drove 65, then did a day where I reset and drove 80.

80 yielded me 19.6 and 65 yielded me 18.9. THis was with it 55 degrees or so out each day.

[londi1tagaholy]

Originally Posted by nosympathy

that is what I have been getting. When it was warmer out was right about at 20.

---------- Post added at 03:45 PM ---------- Previous post was at 03:44 PM ----------



what gearing do you have? I actually got worse street MPG when I had 3.31 gears than the 3.73 gears I have now.

I have a stock gears. ( 3.31?) So if i upgraded to 3.73 would it improve?

---------- Post added at 12:55 PM ---------- Previous post was at 12:53 PM ----------

Would upgrading my stock intake improve MPG? any suggestions?

[nosympathy]

Originally Posted by londi1tagaholy

I have a stock gears. ( 3.31?) So if i upgraded to 3.73 would it improve?

---------- Post added at 12:55 PM ---------- Previous post was at 12:53 PM ----------

Would upgrading my stock intake improve MPG? any suggestions?

Honestly on the 4.6L V8 I am not sure. I know for the newer cars a steeper gear can help with city driving but can also not help as the car feels faster off the line and you will want to floor it more often!

With the 3.73 gears I can drive 40 on city roads and sit in 6th gear, with the 3.31 gears I had to sit in 5th at a higher rpm. YOu don't have a 6th gear, so I am not sure if it would help or hurt you, since you'd get stuck in 5th?

Intake might get you +1 or 2 MPG and that would be it. even then Maybe. Yet again unsure on the 4.6L as most of us have the 5.0

[tc x 4]

Originally Posted by londi1tagaholy

Hi, i recently bougt a GT 2010 Mustang and im kinda disappointed about the city milage. I believed it was advertise as 18 but ive been getting 14. Any suggestion? i didnt put any mods on it except Flow master muffler. Thank you and have a great day

It's the axle backs causing the bad mpgs. Admit it, you love the sound. I've never got more than 14mpg on my 4.6

[londi1tagaholy]

Originally Posted by tc x 4

It's the axle backs causing the bad mpgs. Admit it, you love the sound. I've never got more than 14mpg on my 4.6

Yes i do love the noise (shall i say music) and i thought axle back and muffler are the same.. you made me read about it.

[UltArc]

Originally Posted by londi1tagaholy

I have a stock gears. ( 3.31?) So if i upgraded to 3.73 would it improve?

---------- Post added at 12:55 PM ---------- Previous post was at 12:53 PM ----------

Would upgrading my stock intake improve MPG? any suggestions?

By increasing gears, you are increasing the engine speed for a given travel speed.

This is just an example, but simply:
3.31 gears at 65 mph in top gear is 2200 rpms.
3.73 gears at 65 mph in top gear is 2400 rpms.

So engine speed increase for the same driving speed. I can not really think of a time gears will become MORE fuel efficient.

On the forum I have learned about maximizing vehicle efficiency, the cone intakes do not consistently make a noticeable difference, in fact my testing has shown it is worse with the cone. I still use it, like it, and suggest it, though lol

Originally Posted by nosympathy

Honestly on the 4.6L V8 I am not sure. I know for the newer cars a steeper gear can help with city driving but can also not help as the car feels faster off the line and you will want to floor it more often!

With the 3.73 gears I can drive 40 on city roads and sit in 6th gear, with the 3.31 gears I had to sit in 5th at a higher rpm. YOu don't have a 6th gear, so I am not sure if it would help or hurt you, since you'd get stuck in 5th?

Intake might get you +1 or 2 MPG and that would be it. even then Maybe. Yet again unsure on the 4.6L as most of us have the 5.0

Maybe with an auto there is trouble, but I am a v6 standard, and I can drive in 6th as low as 28 ish mph. When I drive at 39 mph in 6th, I get 50+ mpg with real low rpms. 2.7x gearing.

[nosympathy]

Originally Posted by UltArc

By increasing gears, you are increasing the engine speed for a given travel speed.

This is just an example, but simply:
3.31 gears at 65 mph in top gear is 2200 rpms.
3.73 gears at 65 mph in top gear is 2400 rpms.

So engine speed increase for the same driving speed. I can not really think of a time gears will become MORE fuel efficient.

On the forum I have learned about maximizing vehicle efficiency, the cone intakes do not consistently make a noticeable difference, in fact my testing has shown it is worse with the cone. I still use it, like it, and suggest it, though lol

Maybe with an auto there is trouble, but I am a v6 standard, and I can drive in 6th as low as 28 ish mph. When I drive at 39 mph in 6th, I get 50+ mpg with real low rpms. 2.7x gearing.

Yeah a V6 with 2.7x gearing com paired to a 5.0 with 3.73 gearing.

My car "can" drive 6th down to 35 any lower and my car is idling RPMs and will stall.

[UltArc]

Originally Posted by nosympathy

Yeah a V6 with 2.7x gearing com paired to a 5.0 with 3.73 gearing.

My car "can" drive 6th down to 35 any lower and my car is idling RPMs and will stall.

Ah, I was thinking you could take it lower. Gearing confuses me a bit, I have to take it slow.
I was thinking with the power you guys have, you would be good.

[sammy13]

I have a 5.0 with 3.73 and if I'm driving it like an ass I average like 16mpg but lately I've been driving not like an ass and I get like 19

[londi1tagaholy]

Originally Posted by UltArc

Ah, I was thinking you could take it lower. Gearing confuses me a bit, I have to take it slow.
I was thinking with the power you guys have, you would be good.

How is that Ecomodder?

[nosympathy]

Originally Posted by UltArc

Ah, I was thinking you could take it lower. Gearing confuses me a bit, I have to take it slow.
I was thinking with the power you guys have, you would be good.

Yeah it has a tone of power but with where my gearing puts 6th on the 5.0 it ends up around idle Rpms which it can do going downhill but get a slight hill and stall city.

[mtnman325]

The taller the rear gear numbers, the lower the rear wheel rpm at the same engine rpm. Off roaders want tall gears. In other words, higher numbers for higher hills.

It is a balance of engine peak efficiency to desired highway speed. The normal rule is to lower engine rpm to the lowest engine efficiency curve for maximum gpm.

A gasoline engine performs better with higher intake manifold temperature. The increased temperature creates higher molecular activity in the fuel, which allows for more complete combustion, aka better gpm.

The payback in changing the pumpkin ratio is going to be a long, thin line. Better to change the fluids to synthetics, and realize immediate returns on the investment, plus longer life of the vehicle.

[Tominkc]

Yes!! That sounds right!! During the summer I was getting an average of 29.4- 20.6!! Now with winter here it's dropped to average of. 18.4

---------- Post added at 02:52 PM ---------- Previous post was at 02:49 PM ----------

Now I need to clean my filter and sensors and the TB with all the salt on the roads!! Don't want to mess them up!!

[Yellow50]

Originally Posted by Tominkc

Yes!! That sounds right!! During the summer I was getting an average of 29.4- 20.6!! Now with winter here it's dropped to average of 18!

Me too

[Andy714]

If it makes u feel bettrr my.v6 gets 16 mpg

[mustangman5345]

I get about 15 in the city with my manual 2010 GT. I drive it like I stole it so you should be getting about the same if you have a heavy foot.

[Ucfknight]

Originally Posted by mustangman5345

I get about 15 in the city with my manual 2010 GT. I drive it like I stole it so you should be getting about the same if you have a heavy foot.

same here. I have flowmaster outlaws and love the way they sound. It sux when I am trying to save gas and so shift at lower RPMs because I love the way they sound up and above 3000rpms and especially around 5000rpms where the tone sounds super aggressive and nasty. But MPG tank

[jrny99]

I own a 2010 GT 373 gears with a 5 speed manual. I drive it like a mustang should be driven. I recently installed a pair of corsa exhaust and it sounds like the red mustang in the beginning of the movie I am legend. Bad ass. During the week I drive a vw bug. But the weekends are mine. Lol

[londi1tagaholy]

How much RPM do you have if running 80 on 5th or 6th gear (both 4.6 and 5.0) with upgraded gear? i have 2200 RPM.

[elnegro5.0]

Originally Posted by nosympathy

don't agree, I get better gas mileage at 80 than I do 65. At least with my drive from Cinncinnati,OH to Florence Ky I make to work 4 days a week.

I have tested this. Did a day where I reset MPG and drove 65, then did a day where I reset and drove 80.

80 yielded me 19.6 and 65 yielded me 18.9. THis was with it 55 degrees or so out each day.

I have to agree with you on that. I notice I get better mpg going 80 than 65. On My last car it was the other way around.

[UltArc]

Originally Posted by elnegro5.0

I have to agree with you on that. I notice I get better mpg going 80 than 65. On My last car it was the other way around.

In the same gear?

[elnegro5.0]

Originally Posted by UltArc

In the same gear?

Mine is a auto

[nosympathy]

Originally Posted by UltArc

In the same gear?

thought you were quoting me

for me 6th gear with a manual

[UltArc]

Originally Posted by elnegro5.0

I have to agree with you on that. I notice I get better mpg going 80 than 65. On My last car it was the other way around.

Not arguing, but traveling at 80 mph takes ALMOST twice as much aero drag as 65 mph. Must be a pretty nice sweet spot.

Originally Posted by nosympathy

thought you were quoting me

for me 6th gear with a manual

What are your rpms at 35 mph in 6th? I was just thinking with bigger gears, your rpms should be higher than a 6.

[nosympathy]

Originally Posted by UltArc

Not arguing, but traveling at 80 mph takes ALMOST twice as much aero drag as 65 mph. Must be a pretty nice sweet spot.





What are your rpms at 35 mph in 6th? I was just thinking with bigger gears, your rpms should be higher than a 6.

well, per AM on the 3.73 gear.

Approximate RPM for 2011+ GT Manual
Gear Speed
25 MPH35 MPH45 MPH55 MPH65 MPH75 MPH
1 4210 5894
2 2795 3913 5031 6149
3 1944 2722 3499 4277 5054 5832
4 1518 2126 2733 3340 3948 4555
5 1150 1610 2070 2531 2991 3451
6 748 1047 1346 1645 1944 2243

I don't think it is quite right. I'll have to try tomorrow for sure, I am pretty sure in 6th gear the car is below 1K because the car literally will not go forward in 6th at 35mph, I have to downshift too 5th.

also I would like to point out that at 80 the car feels like it cuts through the air effortlessly, compared to 60-65 where I feel the drag on the car more. Still don't feel much, but I feel it more.

[UltArc]

Originally Posted by nosympathy

well, per AM on the 3.73 gear.

Approximate RPM for 2011+ GT Manual
Gear Speed
25 MPH35 MPH45 MPH55 MPH65 MPH75 MPH
1 4210 5894
2 2795 3913 5031 6149
3 1944 2722 3499 4277 5054 5832
4 1518 2126 2733 3340 3948 4555
5 1150 1610 2070 2531 2991 3451
6 748 1047 1346 1645 1944 2243

I don't think it is quite right. I'll have to try tomorrow for sure, I am pretty sure in 6th gear the car is below 1K because the car literally will not go forward in 6th at 35mph, I have to downshift too 5th.

also I would like to point out that at 80 the car feels like it cuts through the air effortlessly, compared to 60-65 where I feel the drag on the car more. Still don't feel much, but I feel it more.

I wonder what it really is. At 39 mph, mine is like 900, and she still pulls.

[londi1tagaholy]

Originally Posted by UltArc

I wonder what it really is. At 39 mph, mine is like 900, and she still pulls.

I see you have the eco modder scan gauge. How is that? does it really works as advertise?