All,

Besides the good answers on the list, you can look up the EPA ratings
for most vehicles at http://www.fueleconomy.gov/feg/findacar.htm .  For
newer cars they also have the tank size, so you can figure out the range.

Currently, the looker-upper at the above link goes back to 1985.  You
can get data back to 1978 as text files at
http://www.fueleconomy.gov/feg/download.shtml . *

And, as always...   your mileage may vary.

Matt Roberds

* Geeks: Why are there funny characters in the first column of the text
   files?