Originally Posted by Pharmacist

Most of those oxyhydrogen claims turned out to be bogus scams and pseudoscience. There are cars that legitimately run on water, but the water is split into hydrogen and oxygen separately in a factory, and then hydrogen is loaded into a tank on the car. No one has yet to make a system that processes water on board the car. Besides, like i said, in the end it takes more energy to split the water than what is recovered during combustion, which means its cheaper and more environmentally friendly to just keep pumping old school dinosaur droppings into the engine, than this fancy water thing.