Watching electrolysis videos

There is an entire playlist that I've constructed on my YouTube channel.  If you are interested, check it out.  It is gregmeadows5593.  This playlist shows how to construct a electrolyzer for water.   It uses common materials.  Plus there's another one there done by another guy.  He installed his on his truck.  Supposedly this improves gas mileage.  I wrote about this idea a few months ago.  Check the Energy label and look back a little to find it.