Fuel milage - Ford Powerstroke Diesel Forum

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post #1 of 11 Old 01-23-2008, 05:23 PM Thread Starter
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Fuel milage

Here is a strange question. Why would I get better fuel milage off one tank than the other and this is done with paper and stubby pencil

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post #2 of 11 Old 01-23-2008, 05:28 PM
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Because the new fuel sucks!!

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post #3 of 11 Old 01-23-2008, 05:36 PM
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Did you fill it the same amount both times? The fillerneck causes alot of foam and will shut off the fuel nozzle.

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post #4 of 11 Old 01-23-2008, 05:39 PM Thread Starter
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Originally Posted by RcnRln View Post
Did you fill it the same amount both times? The fillerneck causes alot of foam and will shut off the fuel nozzle.
sure did I put 100 miles a day on and if I use the rear tank I get 18 and if I use the front tank I get 15.5 I fill up at the same place 95% of the time comes out the same math every time

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post #5 of 11 Old 01-23-2008, 05:44 PM
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Thats weird! I dunno sorry.

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post #6 of 11 Old 01-23-2008, 05:46 PM
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could be related to the fuel....could be related to the pumps. The kickoff of pumps is not the same between pumps....and you can never get the absolute same amount of fuel in a tank so #'s will vary some...
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post #7 of 11 Old 01-23-2008, 05:52 PM
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i have that sometimes to, i dont understand it, but keep in mind the front tank and rear arent the same size, the front is larger than the rear, but when it happens i cant figure it out either. Good Luck

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post #8 of 11 Old 01-23-2008, 05:55 PM
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thats funny. i went up a mtn and got 15 mile to the gal. so i was super happy. but i got 15 mile to gal on the way down. i guess it all works out


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post #9 of 11 Old 01-23-2008, 05:56 PM Thread Starter
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Originally Posted by Farmboy444 View Post
i have that sometimes to, i dont understand it, but keep in mind the front tank and rear arent the same size, the front is larger than the rear, but when it happens i cant figure it out either. Good Luck
just glad i am not the only one trying to figure it out if I find anything out I will pm you

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post #10 of 11 Old 01-23-2008, 06:09 PM
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YUP,,,,that is weard!! I would think it's hard to calculate both tanks being they are both different sizes. When topping off your tank does foam a bit...try and fill up exactly the same way weather topping off or not and see what that does ya. I agree with this winter fuel sucking..... I've lost about 2 mpg!! Politics Prolly

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