OT: Water injection improving gas mileage?, Anyone doing it? Alot of scams with it. Just curious Options

[JRust]

So I have tried a water injection system before. It was about 5 years ago & we used it on a few cars. My father in law started it. It was supposed to use distilled water. We had mixed results with the cars we tried. Along with our mechanic who tried some too. Eventually the support just wasn't there & we quit the project. We did see a noticable jump in response on their park avenue. It would seriously throw you back in your seat when the system was on. It did not improve gas mileage though. I noticed a decent increase in response in my 240sx. Mileage improved on that also from low 20's to high to low 30's. The system seemed to be faulty though. It would work for a week then quit. I couldn't keep it working & although my mechanic was great with everything. The company which I am kicking myself for not remembering just didn't support their product, They tried to help at first but definately gave up.

So I do think there is merit here with water injection. I am just wondering if anyone is using it? If they are what system are they using? Is it just a total crock & a scammers dream?

[DBCooper]

It's an idea that seems to reappear every couple of decades. The first I saw was in the late fifties, early sixties, and what's ironic is that people back then had basically your same experience. Lots of them said there were some indications of an improvement, some huge improvements, but they stopped using the water because there was absolutely no support by the vendor. So there were a lot of cars you'd pull the glass (!) bottle and carrier out of, and unwind the rubber hose from the air cleaner. I will say one thing, if they were still using the water when you did a valve job there was ABSOLUTELY no carbon build-up in their combustion chambers. Those heads were just as clean at 80 thousand miles as they were new. I saw it reappear again in the late seventies, with the oil embargo prices.