sooner than those at the Fredericksburg Costco got a real boost today as
I filled up at Fredericksburg this morning and found my calculated fuel
economy to be just 35.65 mpg.
This economy is over 4 mpg lower than my last tank.
My last tank was 2 mpg higher than the tank before that, and this tank
is 2 mpg below that one.
The average of my last 2 tanks is the same as the average of the
preceeding 2 tanks (using my eyeball calculating technique).
What does this mean? Probably that in order to be fair with each tank,
I should refuel at the same exact pump each and every time. In reality
I won't be able to do this too often.
Maybe I ought to track the pump number at the gas station as well, to
see if any relevant data can be gleaned from a few months worth of data
there.
I'm definitely going to need a bigger notepad.
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