5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

fuel mileage of the 5.0

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Old 04-06-2007, 08:00 PM
  #11  
nitrous_bob
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Default RE: fuel mileage of the 5.0

4.10 gears and i still get 21 mpg w/ the ac running on the hiway

i don't really drive in the city, i'm 1 mile from the freeway going to work, 3 miles from the freeway to my work

twice a week i go to night classes and it's about 10 miles RT city

doing that i average 21+ mpg
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Old 04-06-2007, 08:19 PM
  #12  
usapony
 
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Default RE: fuel mileage of the 5.0

two years ago i put a k&n air intake and bbk x-pipe with flowmaster american thunder mufflers. drove home to pa and got 34 mpg! easy on the throttle, no "playing"

since then, milage has gone DOWN about: 7 mpg.

took it in to my mechanic for a tune-up and to see if anything with the car changed.... nothing


pay attention here:

started monitoring my f150 gas milage after that;

noticed a drastric change in it too (about 8-10 mpg different than it was was)

want to know what i think?

it's the friggen gas!

i think "they" are "cutting" it.

same driving habits (throttle response)

what else could it be?

anyone else experience a mpg drop in the last few years?


usapony
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Old 04-06-2007, 08:26 PM
  #13  
94StinkinLincoln
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Default RE: fuel mileage of the 5.0

the tank before last i noticed it took a while before i had to fill up...the last tank i got...hasnt lasted so long and my mpg adverage (tells me in my car) went down about 3mpg.
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Old 04-06-2007, 08:49 PM
  #14  
86 5.0L
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Default RE: fuel mileage of the 5.0

16mpg 80%/20% city/Hwy

this is driving like a granny [&:]
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Old 04-06-2007, 08:55 PM
  #15  
92hatchLX
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Default RE: fuel mileage of the 5.0

ORIGINAL: usapony

two years ago i put a k&n air intake and bbk x-pipe with flowmaster american thunder mufflers. drove home to pa and got 34 mpg! easy on the throttle, no "playing"

since then, milage has gone DOWN about: 7 mpg.

took it in to my mechanic for a tune-up and to see if anything with the car changed.... nothing


pay attention here:

started monitoring my f150 gas milage after that;

noticed a drastric change in it too (about 8-10 mpg different than it was was)

want to know what i think?

it's the friggen gas!

i think "they" are "cutting" it.

same driving habits (throttle response)

what else could it be?

anyone else experience a mpg drop in the last few years?


usapony
I really wouldn't doubt it! I've noticed that my gas mileage and performancehas been downin the past couple of years, it could be the gas or it's all in my head, who knows. Aren't they adding more ethanol now to fuel then they were last year or two years ago?
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Old 04-06-2007, 09:04 PM
  #16  
AdderMk2
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Default RE: fuel mileage of the 5.0

ORIGINAL: 92hatchLX

ORIGINAL: usapony

two years ago i put a k&n air intake and bbk x-pipe with flowmaster american thunder mufflers. drove home to pa and got 34 mpg! easy on the throttle, no "playing"

since then, milage has gone DOWN about: 7 mpg.

took it in to my mechanic for a tune-up and to see if anything with the car changed.... nothing


pay attention here:

started monitoring my f150 gas milage after that;

noticed a drastric change in it too (about 8-10 mpg different than it was was)

want to know what i think?

it's the friggen gas!

i think "they" are "cutting" it.

same driving habits (throttle response)

what else could it be?

anyone else experience a mpg drop in the last few years?


usapony
I really wouldn't doubt it! I've noticed that my gas mileage and performancehas been downin the past couple of years, it could be the gas or it's all in my head, who knows. Aren't they adding more ethanol now to fuel then they were last year or two years ago?
you hit it right square on the head.. Ethanol based, or added fuels do not burn with as much "power" so the cars will either run lean, or they will increase the amount of fuel they use to make up for it.

Using ethanol based fuels you will DEFINITLY see a DECREASE in mileage.

btw, I get about 20-24
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Old 04-06-2007, 09:15 PM
  #17  
92hatchLX
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Default RE: fuel mileage of the 5.0

What does oxygenating the fuel do? Our gas pumps around here have advertised oxygenating the fuel to help with some bull****. Is there any where we can get just normal gas anymore?
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Old 04-06-2007, 09:21 PM
  #18  
90Lxstanger
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Default RE: fuel mileage of the 5.0

I get about 20ish, witt eh new computer my mileage has went down- get only about 250-270 on a full tank instaed of 320-ish
BTW- im diggin the sig. pic-Adder
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Old 04-06-2007, 09:57 PM
  #19  
stangfan99gt
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Default RE: fuel mileage of the 5.0

my old 89 gt 5 speed with cai, headers, x pipe and catback and stock 2.73 gears got about 23 or 24 mpg on the highway with over 230k miles on it.
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Old 04-06-2007, 10:04 PM
  #20  
LIL D
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Default RE: fuel mileage of the 5.0

not to be a dick but if your worried about gas mileage dont buy a stang and get a four cylinder
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