Originally Posted by wstar

100ml of H2 + O2 is very very little. Sure, that would reduce current consumption and total water needed per km, but it also reduces the possible effects on fuel efficiency as well. The net power will still be a loss (in terms of energy from burning the H2 + O2 vs the current draw to separate them), that's guaranteed. Assuming his tests show positive overall efficiency gains, then we have to figure out where they came from.