What do you mean? asuming a gas application, are you saying the ignition a plug provides cannot be enhanced by a small hydrogen & pure oxygen presence? If so why are so many people doing it? Not talking about the sellers, I mean the people building them on their own. Do they all really have that much extra time on their hands?
See thats the thing, what exactly are you looking for?
lets say hypothetically speacking you get a wild hair and try making one, you do all the research to get the best possible LPM for your money, spend time building it the best you can, are you now gonna spend your money on aftermarket indenpendt testing just so you can post here and say "it works" to those that wont believe you anyway.
I don't have one so can say one way or the other and find it interesting enough to read about.
NOt saying that "the ignition a plug provides cannot be enhanced by a small hydrogen & pure oxygen presence", just that I am not convinced that so tiny an amount of Hydrogen (like homeopathic medicine) can produce any enhancement of combustion at all, much less one that exceeds the extra energy consumed by the alternator to generate that gas. The so called "pure oxygen" is irrelevant too, given that air is about 21% pure oxygen. And many of those atoms re-combine right away, because the H and O molecules are not kept separate (like real electrolysis) where they would recombine into H2 and O2 molecules; here some re-combine right before they leave the water, back into ---water---!!! Maybe that's why so many of these contraptions boil, from the energy of recombined H2O molecules.
The data I want is not "last year I got about this mileage, and now about this". Do the test with resetting the MPG gage, and post the video. Keep a log of 10 fillups before, and after the mod, etc.
How do you know that there are hundreds of people with these things on, that are getting results? I have commented that virtually all gassers doing this, tamper with the Oxygen sensor voltage, which leans out combustion, and changes emissions. The hydrogen is just a placebo.
Automakers are spending millions to get one extra mpg, and these contraptions will raise the efficiency of the engine above the 100% ideal combustion? JCWHITNEY is still selling the fuel line magnets. Unreal. Not enough people are returning them within the 30 day money back, for them to discontinue. I bought one of these magnets as a joke about 5 years ago, and was going to return it on day 29, but something happened in my social life that took my mind away from that. The results were: average mpg (Nissan gasser) before magnet 19. 5 mpg, after magnet, 19. 5. Duhhh... averaged for about 1 year prior, and one year afterwards. Now I use that $9. 99 magnet on a computer cable as an electrical RFI choke. Many computer cables already contain a round magnet on power cords, if you look at them.
Attention: TDR Forum Junkies 
:-laf
