Where are the figures?
Agreed. I'd love to see technology like this developed to the point of providing an actual benefit. But I want to see numbers.
Before/After long-term mpg comparisons. Long trip MPG comparisons, heck, even some dyno numbers would be fun to look at regarding these.
I know that excellent results can be obtained from the (probably unsafe) use of just a hydrogen tank as an additional fuel source - so the question isn't the use of hydrogen, it's how efficient can an on-board generation system get?