Want to see how simple HHO can be done in a car? You don't even need a cell. You can just use the rad water, and yes hydrogen atoms can saturate a block and aid in the combustion chamber, the engine runs cooler and water (burnt hydrogen) drips out the tailpipe, and the battery gains in voltage. Check out my one wire experiment vid, average increase is double your fuel mileage, its a one wire installation, what do you have to lose? Your welcome.