We all know what has become expensive to travel by car, but not only, even those who use it for work or passion whatever means having an engine; it's a car, a truck, a means of work, a boat, etc.etc. must put fuel that is petrol, diesel, LPG or natural gas, however, it has costs. For some time there is a low-cost solution, which allows not just to bring down the entire costs but to reduce them by 10 to 50%. The solution is called "oxyhydrogen" abbreviated "HHO". It is a very simple system of splitting water into a mixture of oxygen and "HHO" hydrogen through electrolysis. With this book we want to illustrate the informants of this new technology criteria, trying to adopt a simple language that can be understood by all, in order to contribute to the protection of human health and the environment.