Ha,ha...The next fuel to proper the Automobiles are the Fuel cells, ( Hydrogen ) and Toyota will launch those vehicle for sale in Japan and US+EU in late this year into 2015. It only takes a few minute to charge up those tank and can go over 600 km before re-fueling.
And Japanese technology is much admired by advanced nations. Its Nuke plant safety and reliability is the most respected one.
Imagine, time after time, those Nuke plant foundation are shaken by earthquake in the magnitude of recorded 9.0 but those edifices still standing erect. The engineers never took precaution in designing anti wave walls high enough and they ever imagined the "nature force" Tsunami waves that came in at over 10 metres pounding on the plant's buildings knocking down emergency reactor cooling diesel power generators.
http://www.toyota.com/fuelcell/