Add in «flexible fuel» options... and you could build vehicles that could get — drum roll, please — 500 miles per gallon of gasoline. (calcars.org)
This 12 ounce bottle will treat up to 20 gallons of gasoline in all. (geekwrapped.com)
Assuming burning one gallon of gasoline produces 20 pounds of CO2, the average American emits almost 2 tons more CO2 related to gasoline consumption than the average Canadian. (treehugger.com)