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Old 01-15-2013, 08:03 AM   #36
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Idk how many times ive drove 20 to 30 miles With my truck telling me 0 miles to E, I dont dare do that with my mustang, but in my work truck it doesnt bother me very much
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Old 01-15-2013, 08:28 AM   #37
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Originally Posted by bradtaylornator
Idk how many times ive drove 20 to 30 miles With my truck telling me 0 miles to E, I dont dare do that with my mustang, but in my work truck it doesnt bother me very much
My trucks same way. My old 05 mustang would say 0 miles to E, you were walking. It ran out twice.
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Old 01-15-2013, 08:53 AM   #38
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My '13 MT with 3.31 gears is showing 20.9 mpg after about 6,800 miles, probably 60% highway and 40% city driving. Best I've seen was a trip where pretty much the whole tank of gas was run with the cruise control at 74 mph. That one was 26.9 by the computer.

If I had known that there was no big mileage penalty for the 3.73 I would have probably done that - the 3.31 gears are fine, but a lot of my driving seems to be on 45 mph roads which kind of leaves you right between 5th and 6th gear. Higher rear, even by a little would fix that.
D
Lol that's around the same mpg I get on my 13 focus... Guess I have a heavy foot
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Old 01-15-2013, 09:02 AM   #39
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My '13 MT with 3.31 gears is showing 20.9 mpg after about 6,800 miles, probably 60% highway and 40% city driving. Best I've seen was a trip where pretty much the whole tank of gas was run with the cruise control at 74 mph. That one was 26.9 by the computer.

If I had known that there was no big mileage penalty for the 3.73 I would have probably done that - the 3.31 gears are fine, but a lot of my driving seems to be on 45 mph roads which kind of leaves you right between 5th and 6th gear. Higher rear, even by a little would fix that.
D
Yeah with 3.73 gears you would be in 6th by 40mph. I had the same thing when I had 3.31 gears. Driving 40-45 usually had to sit in 5th. Sometimes could get 6th but not usually.
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Old 01-15-2013, 10:52 AM   #40
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get on the interstate and reset the mpg calc and keep it around 60mph or even 50-55 see what it does. Check manually and dont trust the calc on the car as its always off for me
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Old 02-03-2013, 10:35 PM   #41
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Update.

Filled up with 93 and gauge said 213 miles to empty. Drove very easy for 95% of the time with some occassional swift accelerations to 60. mainly from rolling in 1st at like 10-15 mph to 60mph. you know just the usual passing someone or merging. total maybe (5 times). Gas light came on. Filled up again. It took 13.2 gallons. I went 182 miles. So 182 divided by 13.2 = 13.78 mpg's. the digital fuel economy calculator in track apps read spot on. Right down to the amount of gallons used and my trip mpg's. to me that kind of mileage is not good. I think i should have had atleast 14.5 give or take a very little for a few speed bursts.

What do you think? Is anyone else getting this kind of mpg's or worse or better?
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Old 02-03-2013, 10:40 PM   #42
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Update.

Filled up with 93 and gauge said 213 miles to empty. Drove very easy for 95% of the time with some occassional swift accelerations to 60. mainly from rolling in 1st at like 10-15 mph to 60mph. you know just the usual passing someone or merging. total maybe (5 times). Gas light came on. Filled up again. It took 13.2 gallons. I went 182 miles. So 182 divided by 13.2 = 13.78 mpg's. the digital fuel economy calculator in track apps read spot on. Right down to the amount of gallons used and my trip mpg's. to me that kind of mileage is not good. I think i should have had atleast 14.5 give or take a very little for a few speed bursts.

What do you think? Is anyone else getting this kind of mpg's or worse or better?
I'm worse. 11-12 mpg. Absolutely 0 freeway driving though... And I'm a bit hard on the gas pedal. 93 race tune 2011 gt.
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Old 02-03-2013, 10:47 PM   #43
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Wow, that is bad. I thought the tune increased mpg's. how is it so many people can get like 20-26 hwy and 19 city. I drive a mixture of both and cant get 15 at all. I really grannied the car around to see if its possible. I doubt my few speedbursts really hurt the mpg that bad. Seriously thinking of getting rid of this car. I just filled up the day before yesterday and drove 130 miles and im on a 1/4 tank already. This car is a guzzler.
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Old 02-03-2013, 10:49 PM   #44
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Wow, that is bad. I thought the tune increased mpg's. how is it so many people can get like 20-26 hwy and 19 city. I drive a mixture of both and cant get 15 at all. I really grannied the car around to see if its possible. I doubt my few speedbursts really hurt the mpg that bad. Seriously thinking of getting rid of this car. I just filled up the day before yesterday and drove 130 miles and im on a 1/4 tank already. This car is a guzzler.
I swear my mpg is worse when I baby it!!!
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Old 02-03-2013, 10:53 PM   #45
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Omg, single digit mpgs. I would drive this car in a lake and claim ins on it if i got single digit mpgs. My 1977 chevy c20 got single digit mpgs. This is 2013, i would expect some progress since 77.
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Old 02-03-2013, 11:12 PM   #46
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I would by another mustang if it got 5 miles to the gallon.
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Old 02-03-2013, 11:57 PM   #47
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What size tires are you guys running? I went from 275/40/19 to a 285/30/20. Mine went from averaging 23 mpg to around 19. The 20's are lighter then my 19's. The lower profile tires will eat up your mileage. My tire revs per mile went from 731 to 776. Now I need some 305/35/20 to return my tire revs back to 731.
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Old 02-04-2013, 12:44 AM   #48
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255-40-19
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Old 02-04-2013, 01:15 AM   #49
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255-40-19
Those tires turn at 768 rpm. Bigger the tire lower the rpm.
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Old 02-04-2013, 02:49 AM   #50
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I get about 16L to 100 Kms city driving and around 350 km to a tank. I went on the highway driving at rpms instead of Kms and i was doing 1500 rpm which was around 100 km and got 8L 100 km and was able to get 580 km on 1 tank
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Old 02-04-2013, 04:38 AM   #51
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Wow, that is bad. I thought the tune increased mpg's. how is it so many people can get like 20-26 hwy and 19 city. I drive a mixture of both and cant get 15 at all. I really grannied the car around to see if its possible. I doubt my few speedbursts really hurt the mpg that bad. Seriously thinking of getting rid of this car. I just filled up the day before yesterday and drove 130 miles and im on a 1/4 tank already. This car is a guzzler.
I have a '13 GT at 10k mi w/ 3.73s and average 12.6mpg on 93 e10, with stock Pirellis & 26# wheels, usually shifting between 2k & 3k with a fairly heavy foot, mostly city, near sea level. Ive heard others shift before 2k, with a tune, no spirited driving, getting 20+ on the highway, but where's the fun in that? Ill probably be taking my baby on a 2K mile trip in March. Will report back mpgs. I think the biggest factors are shift points, tune and driving style. If I get fewer mpgs than the next guy with the same car, though, I assume Im getting more HPs so its all good.
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Old 02-04-2013, 05:11 AM   #52
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im sitting at 14,344 miles and my average is 19.7. Spirited driving about 20% of that with performance tune from Bama, Boss IM, Airaid CAI, Cat deletes, Midpipe, Roush exhaust, 331 gears, and 93 octane. Its hard to stay off the throttle when everyone around you expects you to give them a show.
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Old 02-04-2013, 05:47 AM   #53
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It usually takes me a whole month to burn through a full tank of gas.
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Old 02-04-2013, 05:53 AM   #54
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What size tires are you guys running? I went from 275/40/19 to a 285/30/20. Mine went from averaging 23 mpg to around 19. The 20's are lighter then my 19's. The lower profile tires will eat up your mileage. My tire revs per mile went from 731 to 776. Now I need some 305/35/20 to return my tire revs back to 731.
If you gain in wheel what you lose in rubber (with a smaller sidewall) it won't change a thing. Not trying to debate,just making a statement.
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Old 02-04-2013, 08:36 AM   #55
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It sounds like people are driving a lot of local traffic with lights. How long is your commute? Does the car warm up completely? Winter gas blend in nj also kills about 2-3mpg with the ethanol for emissions. Try resetting the mpg indicator on the highway after its warm on a longer trip (20 miles +) with fairly continuous driving (no stoping). That's where you'll see the advertised highway mpg (cursing in 6 at 50-60mph).
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Old 02-04-2013, 09:06 AM   #56
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It usually takes me a whole month to burn through a full tank of gas.
i hate you

---------- Post added at 10:03 AM ---------- Previous post was at 10:02 AM ----------

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im sitting at 14,344 miles and my average is 19.7. Spirited driving about 20% of that with performance tune from Bama, Boss IM, Airaid CAI, Cat deletes, Midpipe, Roush exhaust, 331 gears, and 93 octane. Its hard to stay off the throttle when everyone around you expects you to give them a show.
im green so everyone expects a show. sometimes i give it but not always.

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It sounds like people are driving a lot of local traffic with lights. How long is your commute? Does the car warm up completely? Winter gas blend in nj also kills about 2-3mpg with the ethanol for emissions. Try resetting the mpg indicator on the highway after its warm on a longer trip (20 miles +) with fairly continuous driving (no stoping). That's where you'll see the advertised highway mpg (cursing in 6 at 50-60mph).
ya i do a lot of inner city driving and lots of lights. i live 5 minutes from work and after i get out at 5pm it takes literally 30 minutes to make it home. its like im idleing all the way home. bumper to bumper. i think that kills my mpgs bigtime. but even with my other cars ive had i got better mpgs than the manufacturer claimed.

when i did this mpg test i reset the entire trip monitor. i calculated the figures on my calculator and compared them to what the car trip reader said i got.
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Old 02-04-2013, 09:16 AM   #57
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I'm averaging about 20-ish on my '13 with 3.73. Never reset the computer from new & it's accurate enough against my math.
I agree 100% with that. I have 3:73 Gears as well. I noticed mine was off a little, but then I watched my shift cycles and I noticed it was me burning gas, or when I left the car idle that I would lose mpg. Maybe it's part the driver and part the cars system? I adjusted my driving (gear shifting local comute) and my gas milage is fine ever sense.

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If you gain in wheel what you lose in rubber (with a smaller sidewall) it won't change a thing. Not trying to debate,just making a statement.
I agree, ans sometimes it's a lot more to deal with how your car is setup. Little tweaks in the car can casue a varied response in your mpg.
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Old 02-04-2013, 09:26 AM   #58
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I haven't reset my MPG counter in about 3 months. If you're resetting it every time you fill up, your MPG's will be more effected by idle times.
I usually rest my counter before and after long trips to make sure I can get distance out of my trip, becasue I hate to stop once I get going some place.
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Old 02-04-2013, 10:05 AM   #59
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How new is your '13? I bought mine last July and she didn't see MPG over 17 until probably 5k on the odometer.

I drive Chicago traffic nearly every day (city/highway mix) and average 19-21 mpg, with the mods listed in my sig. I tend to grannyshift a lot, though. I consider it a good day if I manage to have a reason to wind it up past 3500rpms, most of my shifting is at 1800-2000.
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Old 02-04-2013, 10:12 AM   #60
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if i shifted at 1800-2000 i would feel like im going no where. i usually shift at 3500 and my rpms drop to about 2k. so im always starting around 2k. i use 6th gear to cruise at so it usually puts me at around 1300 rpms. i have 3.73's.
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Old 02-04-2013, 10:48 AM   #61
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if i shifted at 1800-2000 i would feel like im going no where. i usually shift at 3500 and my rpms drop to about 2k. so im always starting around 2k. i use 6th gear to cruise at so it usually puts me at around 1300 rpms. i have 3.73's.
I also usually shift over 3k and get crappy mpgs too. I recall an article somewhere saying that mpgs in an 11+ stang are largely about RPMs. The lower you go, the better youll do. I cant shift below 2.5k for the same reason as you. Why have a Mustang if youre going to drive it like a Prius?
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Old 02-04-2013, 10:51 AM   #62
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I also usually shift over 3k and get crappy mpgs too. I recall an article somewhere saying that mpgs in an 11+ stang are largely about RPMs. The lower you go, the better youll do. I cant shift below 2.5k for the same reason as you. Why have a Mustang if youre going to drive it like a Prius?
thats right. no sense in having 420 ponies if your only gonna keep em caged up. i would hate to be behind the guy shifting at 1800 rpms. that would drive me insane. that would take like 25 seconds to get to 60 mph. that would cause me to be an ******* and zoom around him and brake check his ***.
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Old 02-04-2013, 12:03 PM   #63
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I have a 93 race tune, 3:73 gears! On hiway at 75-80 mph I'm getting around 21.6 mpg, but on city driving I get 19.4 mpg. Buy since winter hit and its been colder it dropped down to 18.4 in city! Go figure! I'm sure it's from warm up and using more gas when cold!!!
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Old 02-04-2013, 12:23 PM   #64
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^^how are you getting those mpg's?
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Old 02-04-2013, 12:26 PM   #65
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91 race tune, 3.15 auto, stock 19" wheels/tires driving a mix of city and hwy and getting on it hard whenever it is prudent to do so.. I get 18.8 mpg
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Old 02-04-2013, 12:35 PM   #66
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^^how are you getting those mpg's?
Tune, auto shifting
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Old 02-04-2013, 12:38 PM   #67
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seems like the auto trans get much better mpg's. stick is more fun though
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Old 02-04-2013, 12:38 PM   #68
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I also have a 13 GT with 3.73 and I usually get 17.8 in the city and 22 on the highway. I now have 7500 miles on her also. If I push it a lot from light to light shifting at 3500-5000, fuel mileage did drop down to 14 in town. On the open interstate staying between 68-75 gets me 22mpg, going 78-85 fuel drops back down to 20.6, no mods done yet.
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Old 02-04-2013, 12:44 PM   #69
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i only have 3400 miles on mine so far. that may have an affect on my mpgs
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Old 02-04-2013, 12:45 PM   #70
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I've got a 2011 with 3.73 and I get around 14-15 in te city with a heavy foot and 20-22 at 80 on the highway
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