[dremd]

I've got an Idea; build an MPG guino run the car around for a few tanks (get it calibrated).

Then do a simple experiment.

At constant speed / load switch on/ off the HHO generator (cockpit mounted switch). If less / more fuel is in fact required then the dutcy cycle of the injectors will change and be detected by the Guino.

Repeat several times to get a consistent reading

Sounds good?

Any body is more than welcom to modify my proposed test method.