How Much Sodium Hydroxide Do You Add to Water for an HHO Generator?

Considering ever-rising gas prices and the fact that most cars use only 14 to 26 percent of any given tank of fuel for actual driving, it's little wonder fuel economy is more important than ever.

HHO Generators

Adding a HHO generator improves your car's fuel efficiency.Adding a HHO generator improves your car's fuel efficiency.
HHO generators are designed to increase fuel efficiency.

HHO generators -- hydrogen generators to many -- work by a method called electrolysis. Water is split into individual components hydrogen (H2) and oxygen (O). These gases mix with the fuel in the engine and ignite, creating a higher octane fuel. The higher octane, in return, contributes to more complete fuel burning, reduced emissions, smoother running and the end result -- more miles per gallon for your car.

Sodium Hydroxide

The electrolysis process relies on the application of an electrical current inside the HHO cell. The cell contains distilled water and an electrolyte -- preferably sodium hydroxide (NaOH). While some use baking soda or potassium hydroxide (KOH), sodium hydroxide -- better known as lye -- is considered superior in performance to baking soda and more readily available than potassium hydroxide.

Calculating the Amount

Most cars operate efficiently when they produce 4 to 20 amps of electrolysis. This equates into, at most, 1/4 ounce (about 2 teaspoons) per quart of water, or 1 ounce (8 teaspoons) per gallon. Test the solution with a DC amp meter to test the amp draw: too high and the HHO cell will run hot.

About the Author

Karie Fay earned a Bachelor of Science in psychology with a minor in law from the University of Arkansas at Monticello. After growing up in construction and with more than 30 years in the field, she believes a girl can swing a hammer with the best of them. She enjoys "green" or innovative solutions and unusual construction.