For the past month I have been building and testing A hydrogen generator. After Lots of ups and downs I have finally finished. I researched different types of generators, and different methods of building. I picked a ''style'' and decided to invest some cash and build it. There were allot of hard to find parts, but I was able to get it done. The only thing left to do is drive it and see how much of a difference it will make. It produces Hydrogen well enough to Light the bubbles in a bottle and make a pop similar to a black cat firecracker. Until I can get a interceptor gauge, I will be setting the trip odometer and going by 1/2 tank intervals. I'm expecting a 15%-30% increase in gas mileage, but even if its only a 10% I will still think its worth the investment. I get about 16-18mpg now so that's roughly 2mpg at worst. If it produces Hydrogen like I built it to, I should see 25-30mpg. only time will tell. I will dyno test it in a week or so to see if there is any hp increase. I don't think there will be but who knows. P.S.--- if any one wants to let me barrow their interceptor, After I get my Data I will mail it back, or make a deal and build you a kit for the gauge. Cost me about $275 to build after all parts and special tools were bought.