Reuters: Imagine driving across America using a fuel so new you have to carry your own supply wherever you go. At the start of the 20th century, before the era of ubiquitous gas stations, drivers did just that as they tested the limits of cars like the Ford Model T, which ran on gasoline, kerosene or ethanol and could, if driven carefully, travel more than 150 miles on a full tank. Now a new generation of drivers is set to embark on a similar kind of experiment. Until recently, most …