40 MPG in 2015 GT! - Mustang Evolution

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Old 07-10-2015, 09:25 PM   #1
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40 MPG in 2015 GT!

I was driving on the highway in sixth gear going about 60 with RPM's at roughly 1500. Had the AC on and cruised about 10 miles with an average of 39.9 MPG. Never put it in neutral or anything, just driving in sixth at 60 mph steady. I have a Bama tune and Cat Back exhaust. I was able to get low thirty's before the tune...
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Old 07-10-2015, 09:27 PM   #2
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40 MGP in 2015 GT!

That's some great miles gallon per!
Sorry, I couldn't resist. But seriously that ridiculously good for that kind of power and that kind of economy. Very interesting.
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Old 07-10-2015, 10:17 PM   #3
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That's a inaccurate mpg when you reset it will give you false readings need to log miles to show true miles per gallon. Now I have 500 miles mine won't go over 20 mpg but when I reset mine the # was in the 30's


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Old 07-11-2015, 06:29 PM   #4
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So after driving some more stop and go and then another 10 miles or so on the highway, I am still averaging 27 combined. I would say that's incredible for a 435 HP car.
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Old 07-11-2015, 07:25 PM   #5
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Just wait a few more miles.... Lol.


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Old 07-12-2015, 01:00 PM   #6
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Have never seen one of these mpg computers to be anywhere near correct. Fill tank till nozzel cuts off first time, reset trip o meter..drive till tank shows almost empty. Go back to same pump and fill till 1st cut off. Then divide the gallons into miles.there you have real mpg.you will be surprized. Let ys know
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Old 07-12-2015, 04:24 PM   #7
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10-20 miles won't give you anywhere near an accurate reading.


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Old 07-12-2015, 04:48 PM   #8
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Tough crowd......
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Old 07-12-2015, 04:56 PM   #9
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I think my boss has averaged 25 or 26 so far lifetime which is Damn impressive for a 400 hp car
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Old 07-13-2015, 03:18 AM   #10
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Lol my thing shows 16.7 MPG but i do alot of city driving and when i am on the high way i usually do 75 not to mention i like to "feel" that pull in the seat feeling a few times doring the week if you know what i mean.

I got this car knowing full well that gas milage was going to be crapy.
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Old 07-13-2015, 03:23 AM   #11
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---------- Post added at 01:23 AM ---------- Previous post was at 01:23 AM ----------

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Old 07-13-2015, 03:24 AM   #12
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Quote:
Originally Posted by ddtmoto View Post
Tough crowd......
Only providing the truth. 10 to 20 miles of driving is giving you a 10 to 20 mile average of your miles per gallon; don't be disappointed when it drops to it's true average after a tankful (or two) of gas.

I can easily obtain the same results in my F150 when pulling my camper; I reset the edge evolution programmer's MPG setting, then head out. As I cruise the highway, I easily see "30+" on its instant MPG display. That's on a flat highway, foot barely on the drive by wire pedal.

When I reach my 300 mile destination, my "average" is showing about 13.5 MPG.
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Old 07-13-2015, 12:16 PM   #13
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Personally the only way to check mileage is as Allydriver1 mentioned.
For a number of years I had a 2008 Dodge Ram 1500 Quad cab Hemi as my tow rig..............I towed my race car which as a total of 4500lbs behind the truck. Drove 700 miles from San Jose to Oregon City on I5..........biggest mountain was 4200ft. My gas computer kept reading between 8/20mpg. When I filled up I checked mileage and was getting 16mpg, which isn't bad. I also drove back to San Jose and got the same mileage reading
My Mustang normally averages 17/18mpg around town and a high of 25/27mpg on the highway.................even with my 3.73's at 75mph.......I never rely on the computer, just calculate it myself.
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