fuel economy - MustangForums.com

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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 economy

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Old 07-27-2009, 11:59 PM
  #1  
86capri
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Default fuel economy

ok so i know being a v8 and all mustangs arent exactly known for excellent gas mileage but i recently filled up my tank and reset my tripometer to figure out how many mpgs i was getting. i got up to just nearly 200 miles before my tank was pretty much empty so i divided 200/15 because i think the stock tank holds 15 gallons of gas (right?). the answer is 13.3 mpg which is pretty bad anything i can do to increase this? i tried driving better too, like downshifting instead of breaking etc.
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Old 07-28-2009, 12:07 AM
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mjr46
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you should use the amount you pump into the tank and divide by total trip miles = correct way, not by what tank may or may not hold
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Old 07-28-2009, 12:08 AM
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86 5.0L
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the best method is to

fill the tank
reset the odometer
drive
refill

now take the miles driven and divide by the gallons used to refill
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Old 07-28-2009, 01:01 AM
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My first tank from winter I got 14 but since then I have been getting roughly 17-18mpg. It is still stock but I do beat on it pretty good.
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Old 07-28-2009, 02:23 AM
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Dj_Seph
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I beat mine damn hard and I still get at least 17mpg. Get a good intake, underdrives, and a free flowing exhaust.
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Old 07-28-2009, 12:59 PM
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tohoopty
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i get around 20 21 in mine.and my car isnt even running right and only has one oxygen sensor.
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Old 07-28-2009, 01:18 PM
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FivePointOhh
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i use to get 22mpg's on average.

to improve your gas milage, do a tune up, check for codes. and get an ignition box(multiple sparks below 3k rpms, more sparks=more complete burn=more power=less effort to get vehicle moving=better gas milage )
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Old 07-28-2009, 01:21 PM
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projectresto83
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I got 12-16 with my carbed 306 that was backed by a c4 (auto 3 speed) with me beating on it the whole time.
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Old 07-28-2009, 07:31 PM
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I'm getting 23 on the highway with 4:10's and 27" rear tire, if i'm nice to it. 16-17 back and forth to work(around 10 miles each way)
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