I use HHO and a MAF sensor enhancer on my '96 5.0 Explorer. Works great, could not be happier. Hooking up a MAP/MAF sensor enhancer is too easy and works even better. My increase is from 18 mpg to 24 mpg. No joke!

Not huge but pretty good for AWD V8. I actually build MAP/MAF sensor enhancers now. Check em out if you need one. ************.com