HHO gas (AKA oxyhydrogen, aquygen, or Brown's Gas) is actually a mixture of two gases, hydrogen and oxygen, in a ratio of 2 hydrogen molecules (H2) to one oxygen molecule (O2). This ratio sounds familiar - it's the same 2-to-1 ratio that exists in a water molecule (H2O). Except that water is not a mixture of hydrogen and oxygen - it's a compound of them, meaning there's a chemical bonding between each two hydrogen atoms and one oxygen atom to make up a water molecule (H2O).
Through electric power, in a process known as electrolysis, the chemical bonding of the water molecule is broken, and the hydrogen and oxygen atoms bond with their own kind instead. Each two water molecules turn into two hydrogen molecules (H2) and one oxygen molecule (O2), and mixing them together makes oxyhydrogen, or HHO gas.
While water is not flammable, HHO gas is. In fact, its flammability is being used in a variety of ways, not just for running cars on water and gasoline together, as you will see below.

there are many benefits to converting your car to run
on water and gasoline together:

• Save money on gas, especially in the prices of today (and probably the even higher prices of tomorrow).
• Increase your gas milage.
• Save time by stopping less at gas stations.
• Reduce emissions harmful to your health and the environment.
• Enhance engine efficiency and performance.
• reduce engine temperature.
• Drive more smoothly and produce less vibration and noise.
• Reduce your country's addiction to oil.
• Do-it-yourself, simple, cheap, and using only common hardware.

HHO gas, in itself, is not an innovation. It is being used in a variety of ways, most commonly in lighting and in burners for welding and cutting certain materials (glass, plastics, metals) due to the high level of finishing that cutting with HHO gas can achieve.

Yull Brown is an inventor who came up with a way to produce HHO gas from water on demand and on the spot, with high efficiency and very high precision in terms of the ratio of hydrogen and oxygen acquired by the process.
Yull brown received a patent for his process in 1977, and as a result HHO gas is often referred to as "Brown's Gas".

There are a number of hybrid cars on the market today, like the Toyota Prius. These are gasoline-electic hybrids, meaning it has two separate engines - a regular internal combustion engine running on gasoline, and an electrical engine running from the car battery. The electrical engine goes into action, for example, when you stop at a traffic light.
The manufactured hybrid cars have the same advantages a hybrid water-gasoline car has. They save on gas expenses, increase gas milage, reduce emissions that are bad for the environment, and produce less noise.
The drawback is ready-made hybrids use two separate engines. You can't convert your car yourself to a hybrid gasoline-electrical, You have to sell your old car and buy a new one. and even if you could add a whole new engine, it would be very costly and require highly skilled labour, so you'd end up paying a fortune to a professional mechanic.
With HHO gas, using one of these - Water4Gas, Run Your Car On Water, DriveWater, or Drive With Water Fuel - you can do the job yourself for almost no money, with very little hardware you can find in any hardware store, and with minimal mechanical skills.

Also, keep in mind that all the advantages of ready-made hybrid cars are only when the electrical engine is in power. When their regular internal combustion gasoline engine is in power, they don't reduce emissions or noise more than any other car. And when you drive on a freeway, for example, the gasoline engine works all the time.
A hybrid gas-water car will reduce emissions and noise ALL THE TIME, because the combination of fule and HHO gas is in action ALL THE TIME.
Go to Water4Gas, Run Your Car On Water, DriveWater, or Drive With Water Fuel to read more!

Fascinating, isn't it? it's like a whole new world of an alternative supplemental energy source for your car.
But that's not all; I'll be adding more stuff, more information, more Q&A as time goes on; So make sure you bookmark this lens and come back every so often to check it out!
See you again!
Humbly yours,
Damian