I was looking at an old post about adding specific stats to the website, prior to the custom stats being added. The custom stats are totally cool, but one stat i'd been keeping track of before joining the site (thank goodness for the importability as i had 63 fuel ups i could add in one click) was Price/day. A simple calculation, cost of fuel up divided by the number of days between fuel ups. A very interesting stat, not necessarily 100% accurate as the number of days between fuel ups could be skewed by a vacation or something, but still if you've been driving to work everyday, it is nice to see what the daily cost for fuel is. It can be a little soul crushing, but it is good to know.