AKA Brown's Gas, HHO has been around for over 100 years, and now that gasoline is over $4 FRNs per gallon, the cost benefit for experimenting with HHO is quite compelling.
I'm tuning up my rig so that it gets a consistent 20 miles per gallon with gasoline only, and then I will add the HHO and hopefully increase to 30 mpg.

I agree with Patriot that stainless is the only way to go!

I would gladly lay aside the use of arms and settle matters by negotiation, but unless the whole will, the matter ends, and I take up my battle rifle, and thank God that He has put it within my grasp.

Audit Fort Knox!