[UFO]

Originally Posted by TheEnemy

ScienceDirect - International Journal of Hydrogen Energy : On-board fuel processor modelling for hydrogen-enriched gasoline fuelled engine

Calculated that for on board generation the generator would have to operate at a 90%+ efficiency for an improvement.

And this is patently impossible. Hydrogen generation by electrolysis includes losses in your alternator and the heat losses in the hydrogen generator. By the way, the linked article has nothing to do with hydrogen generation by electrolysis of water, and as such has NOTHING to do with the topic at hand.