I've actually been following this for some time. Ford experimented with plasma ignition about twenty years ago, never put any emphasis on development. A significant volume of fuel is lost, unburned, via the exhaust. It's currently used to feed the catalytic converters to raise their temp, in order to catalyze excessive HCs, and remediate CO and NOx (oxidation and reduction catalysts). We've been conditioned to believe that the stoichiometric value for a gasoline combustion engine is 14.7 parts air to 1 part fuel, when it's actually 15.3, by the math. 14.7 simply gives us the lowest combined level of exhaust gases, not true stoic for HC catalyzation. With plasma ignition, gasoline could run around 20:1 instead. We'd still have thermal losses due to heat migration into metal engine components, and still have the same volume of exhaust, which is determined by intake air volume, not by combustion efficiency. Now, I'm not saying I think this guy has cracked all problems with plasma ignition, but the science referenced by the article is possible.