When you employ HHO conversion plans on your car, you will see a lot of benefits. You will save tons of money on gasoline. A number of people who have used HHO plans have seen their miles per gallon average soar by 60 percent, though 25-30 % is usually the standard. But some of the advantages to using HHO conversion and driving a water hybrid car are not financial. Your engine will last longer, and it will have more power.