add "$ paid per gallon" section to fuel log?

[othergames]

My first tank was included with the car, and since then I've taken significant advantage of my supermarket's fuel-discount program. I actually haven't paid for gas in several months.

[rsx2002]

I would like to see days between fill ups recorded. thats just as important than MPGs to me.

[MetroMPG]

rsx: what are you thinking, something like a "N days since previous fill" that gets computed each time you make a new entry?

Other people: suggestions noted & added to the to do list.