I know the overall benefits of HHO, better gas mileage and better for engine and emissions.
For the sake of $$$ and saving MPG. Do these other 2 devices work as a stand alone?
FS3,
I read about this saving 10% to 20% mpg for vehicles that are not using HHO.
Performance chip,
GForce has a performance chip that also adjusts the air/fuel ratio for better MPG and performance.
Both of the said devices are under $100
Opinions, experience?