Is there any way to mark errant data from fillup entries that are likely to be in error? There's one entry in the category below that apparently had one fillup of over 10 thousand gallons in a single fillup, and it skewed the average MPG not only for that fillup but for the entire model. Likely it was supposed to be 10 gallons rather than 10,000 unless it's a supertanker custom.
Maybe worthwhile having some kind of boundary checking when entering data to make sure a decimal place wasn't inadvertently misplaced.
http://www.fuelly.com/car/ford/focus/2010/tater89/30734
May be good to have an option to exclude the extremes to achieve better accuracy on the overall model MPG calculations.