I ordered one yesterday. (Hydro4000) I should know within a couple of weeks if it's snake oil or not. If it works as advertised I'm going to become a distributor locally. I did the math & at $3.50 gas the payback would be 8 months on my F150. As gas goes up the payback gets shorter. I put it on my credit card so if it turns out to be snake oil I have an out. I'll post the results.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.