This technology has been around for a long time. The twist they put on it is the electrolysis portion. You may see a small gain in mpg like .1 mpg. Search the net and ebay and you will see similar products. If it worked as good as they claim you'd see a commercial for them on every channell twenty times a day. BTW you can make your own version for about twenty bucks. They even give you the schematics.