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Old 02-18-2008, 11:10 PM   #8 (permalink)
WaxyChicken
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Quote:
Originally Posted by bbb3108RNN View Post
how do I keep track of/calculate my MPG? Let's say I fill the tank, record the mileage, drive until 1/4 tank, then re-fill the tank and record the mileage. Now how do I calculate MPG?
Fill tank full.
Write down Miles ( X )
Drive Car
Refill Tank full.
Write Down Gallons needed for refill. (Y)
Write Down Miles (Z)
X - Z = A
A / Y = MPG

Or - if you have a trip meter

Fill tank full.
Reset Trip Meter
Drive Car
Refill Tank full.
Write Down Gallons needed for refill. (Y)
Write Down Trip Meter (X)
X / Y = MPG

For most accurate results, use the same gas pump the both times.
Stop filling/refilling on the first click.

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