Is the MPG average 'weighted'? - Fuelly Forums

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Old 03-27-2011, 07:22 AM   #1
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Is the MPG average 'weighted'?

Does 43 mpg(for example) have the same 'power' to the average mpg over more miles? To explain, Say I got 43 mpg for just 100 miles of driving. Would that affect the avg mpg the same as getting 43 mpg for 300 miles in the same(1) fill up?
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Old 03-27-2011, 08:18 AM   #2
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Your average MPG is your actual mpg. It is your total miles traveled divided by your total gallons added. A 300-mile tank will have more weight than a 100-mile tank.
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Old 03-27-2011, 09:02 AM   #3
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Yep, the average isn't compounding all your fuel up averages equally, we simply take total distance ever recorded in our system and divide it by total fuel by volume to get a real overall average.

It doesn't change much after you have about 10 fuel-ups, so we are talking about including new stats like "avg of last 10 fuel ups" to be prominently displayed.
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Old 03-29-2011, 12:29 PM   #4
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Gotcha. Thanks!!
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Old 03-29-2011, 10:50 PM   #5
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I was curious about this too, and I like the idea of a rolling average so I can see how recent changes are affecting my MPG.

Could I suggest giving an option of rolling x days or x fuel ups? As for me I'd be more interested to see how my last month of driving has been, not necessarily a set number of fuel ups.
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Old 04-08-2011, 06:53 PM   #6
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Good to know. I was wondering that myself.
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Old 05-25-2011, 04:38 AM   #7
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@vr4Legacy

You can track rolling averages by clicking on [Customize Mini Stats] in your car profile and changing the time scale.
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