Originally Posted by 5speedonly
I should get close reading every time I fill up. It never happened. As I explained it flactutes tremmendesly. I would have a different reading for the same miles driven! The key here is how much doest it flactuate? If it's a slight variation then you can calculate the margin of error and get an acceptable reading. In my case, it 's huge; up to 2.5 gallon!
yep, fuel economy changes a lot depending on how and where you're driving. I've gotten 41 mpg cruising across nebraska, and 22mpg doing mountain runs or pizza delivery--all in the same car.