Running your diesel on water(HHO) and diesel fuel !!

I was just looking at some U TUBE clips about running diesel engines on a normal diesel set up plus HHO, hydrogen made from half a litre of water in a home made Hydrogen cell. It would be similar to running gas over diesel fuel with a diesel engine, which is fairly commonplace now but without the bulk of the LPG tank. The small home made generator is made for a few dollars and draws about 4 amps and one guy claims he has increased his mileage from 15 mpg to 25mpg. Now that is a huge saving if touring. Most of the many different clips show a small tube, 8mm dia possibly, coming from the glass honey jar running into a hole drilled into the air intake. When you power up the cell with the cars battery, hydrogen is produced. Now im not suggesting anyone try this but it shows how easy you can make a fuel for basically nothing without taxes or intervention from Governments. Most of the clips on UTube look like an accident looking for a place to happen but im sure the process can be perfected to make it safe.. and the beauty of making HHO as you need it, the danger is probably less that driving an LPG vehicle..Have a look at the U TUBE Hydrogen car clips, its food fro thought!! It certainly beats the hell out of making bio fuel!! Clips are also there for petrol engines, its the same set up. regards Michael