HHO & Fuel Heater Questions

[sethag]

Hello everyone! I'm new here, and I have enjoyed the reading I've done on this site.

I have a 89 D-250 with a Turbo Diesel,(gets 18-21 mph when everything is right) and a recently purchased (gulp) 05 Suburban (fueled 3 times. 14, 17, 19.9 mph respectfully) (the wife wanted it, not me) and a 131 hp tractor. $3.60 farm diesel is a killer.

I just recently learned about HHO. At first I was extremely excited about the concept. If you read the advertisements, one would see it as a miracle cure (or snake oil). From the reading I've done on this site, It is something that could help, but by no means is it a miracle cure. I have always kept close track of my mileage. I check it every time fuel my vehicles or my tractor. I don't have the time to spend experimenting with one, so I was considering buying one from one of these websites, which leads me to my real question. I haven't read anything (or much of anything) in here that has anything to do a manufactured HHO generator. Has anyone bought one and did they have any luck with it?

Also, I haven't read much about Fuel Heaters on here. Some of the websites claim they help the fuel burn more completely. It uses water from the cooling system to worm the fuel. It seems like a quick and simple add to a vehicle. Is anyone using it and is it worth it?