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I think that "Average Tank Distance" should be named "Average Miles Between Fills". The "Tank Distance" metric implies that this is how far you can go on one tank of gas, which would need to take into account our fuel tank's capacity. i.e. Avg MPG X Tank Capacity.
I'm not sure how useful it is to know how often we fill up our tanks, unless that is compared to something static.
Suggestion: Change it to Average Tank Range (based on our 90-Day MPG and tank capacity) and compare it to Estimated EPA Tank Range if we were only getting EPA gas mileage.
For example with my car:
EPA MPG = 20
90-Day MPG = 28.47
Tank Capacity = 15.9 Gallons
EPA Tank Range = 318 miles
Average Tank Range = 452.7 miles
So, my maximum range per tank is 42.4% further than EPA range. (Of course this is identical to "% over EPA MPG", so maybe the percentage measurement is redundant.)
Kurt
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Last edited by kstruve; 10-07-2009 at 08:51 PM..
Reason: Updated math
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