What's the point of farthest on a Tank? My old motorhome had close to 150 Gallons of usable fuel and got 8 miles per gallon = 1200 mile range.

Miles/Gallon tells the real story. Yes it is interesting but only if you seperate out each model of vehicle into seperate classes. Prius, Insight, etc. since the tank size for each model is the same. Trying to compare a Prius with my motorhome doesn't compare, nor would it be fair to compare a Prius with an Insight.

my two cents worth.