HHO ( hydrogen,hydrogen,oxygen) is a name commonly used for a simple process of converting water into Hydrogen fuel for your vehicle, be it gasoline or diesel powered, by way of electrolysis - basically, using your vehicles' voltage to turn water into gas!! this technology has been around for over a century, and yet it is just becoming known to the average person thanks to the Internet!! There are many ways to perform this task, but I'm just going to share with you the simplest one I found through Youtube.