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Old 07-27-2009, 10:59 PM   #1  
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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 07-27-2009, 11:07 PM   #2  
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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 07-27-2009, 11:08 PM   #3  
86 5.0L
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the best method is to

fill the tank
reset the odometer

now take the miles driven and divide by the gallons used to refill
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Old 07-28-2009, 12:01 AM   #4  
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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, 01:23 AM   #5  
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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, 11:59 AM   #6  
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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, 12:18 PM   #7  
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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, 12:21 PM   #8  
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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, 06:31 PM   #9  
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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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