MPG without HHO

[thedore]

I've been running a 1 LPM unit for many months. I get better milage and the engine runs much smoother. The only problem is that when I shut down the unit and expect the MPG to return to the old value it does not happen. Could it be that the HHO helps to burn the carbon out of the engine and that is why there is no instant change. Anyone else have this experience?

[DJLapri]

Hi, same here. I been with hydrogen for 7 days and turned it off, only have the FS2 connected, my MPG actually increased slightly. Makes no sense to me ( all.