Two thoughts: 1) I accidentally entered a tank twice earlier. I don't think there's a way to erase / modify a tank once it is submitted. That would be a nice upgrade. 2) The garage lists the cars by MPG. It would be helpful to me to have additional columns, like "joined date" and "% EPA." Being able to sort in that fashion would help put MPGs in perspective. After all, getting 50 mpg on a car that is "supposed" to get 50 mpg is perhaps different than getting 45 mpg in a tank.