Hmmm... must research this...

It wouldn't be difficult to make an electrolysis set-up for a car, the only difficulty is ensuring a steady flow of hydrogen and oxygen from the system, as you wouldn't want spikes in the fuel-air mixture from intermittent injection. There is probably a lot of valving and electronic control in those kits, but I think it would be possible to get the price under 50,000 pesos if one could be developed locally.

It almost sounds like a crackpot idea, but it's just soooooo..... possible.