So explain how H injection doesn't work again?

[GasSavers_RoadWarrior]

Not sure what you're saying, R.I.D.E. yes peak efficiency is at high load, but efficiency increases with load to that point. I'm only saying that it's because efficiency is awful at low load, that if you add to that load and improve efficiency, you use less extra fuel than you might think because it's more efficient. It's somewhat paradoxical that at best mpg speed, a motor is likely to be operating near it's least efficient, due to the low load demand of steady cruising. That's not news, series hybrid developers aim to run a motor at high load and store the energy. Yes you're using extra energy to make HHO, if your sole purpose in running the motor at all was to make HHO the overall efficiency would suck, however, you're running it to move you and are asking very little of it most of the time, it's not near 35% efficient at this point. Adding load will always use more gas, but adding 10% load could bring it 3 or 4% closer to peak efficency, meaning a relative increase of 15% more efficiency over the low end 20% or so at cruise, such that you are using .85x.3 more fuel rather than 1x.2, thus using 2 units for 20% load while only using 2.5 units for 30% load. So your load has a relative increase of 50% while your fuel consumption only has a relative increase of 25%. So you only have to achieve 50% conversion efficiency with that extra load to get your energy back. If your alternator efficency is 60% and your electrolysis efficiency is 80% you come damn close. You won't do it with a 2 bolts in a jar cell though. So you've made nearly the same BTU value of HHO as it "cost" in gas... but then when you put it back into the motor... MUCH more of the BTU in the H2 gets to the crankshaft than the BTU in the gasoline does. This would be due to differing thermodynamic efficiencies of different fuels in an IC motor. You get that and you get a knock on efficiency effect with higher flame speed promotion.