Asked somewhat regularly; here's a few posts.

http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68&Number=888203

http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68&Number=856242

http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68&Number=944763

Rodeo DI's: http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68
Last 3 tanks avg: 21.5
Last 5 tanks avg: 19.9

Tire size vs mileage, with people posting results
http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68&Number=589685

Etc. Try a search to find out more.

You have to specify what type of vehicle, engine, and mods you have to compare; I have a 2004 Isuzu Rodeo 4x4 DI with tow package and was driving up and down mountains from 500 feet to 8000 feet, plus it's become my daily work driver with stop and go city traffic.

[color:"white"]? 04 Rodeo DI ?[/color] 75k mi, body damage on the 1st weekend I got it.