This is another commonly asked question we get quite often when people are just finding out about hho and the on demand hydrogen world.
The short answer is - Yes!
The long answer: Because our kits create a unique form of hydrogen-oxygen gas, (which is very energetic, and very combustible when ignited inside an engine), the HHO gas will work on any working engine that burns hydrocarbon fuel already. So it will work in all engines currently using gasoline (petrol), diesel, bio-diesel, CNG (Compressed Natural Gas), and LPG (Liquid Propane Gas).
One of our customers driving an LPG conversion Lorry in the UK, got a 50% increase in mileage when he added our hho kit to his vehicle!
If you have an newer vehicle using gasoline, you need an efie/maf tuner for the electronics, which you can see here: http://www.hhokitsdirect.com/collections/all/products/efie-maf-advanced-gas-tuner-for-hho-kits
If your newer vehicle uses diesel or bio-diesel, You will need the Diesel tuner here: http://www.hhokitsdirect.com/collections/all/products/advanced-diesel-tuners-for-hho
If your car is older and still uses a carburetor, or mechanically controlled diesel pump, then the hho kits work fine without tuner chips at all.
If you still need help- feel free to email us through the contact form on our site, or with Live Chat during normal business hours (MON-FRI; 9 am - 5 pm)