I read this article. It confirmed my thoughts that the H2 generator mentioned here is not only innefective but dangerous.
Please read this. The guy knows what he is talking about.
http://answers.yahoo.com./question/i...4131643AAsFG8U
I apologize if this curbs your enthusiasm, but it is a good reality check as it shows the math and hard fact involved with running hydrogen.
Those E Bay sellers are hosing people.
The E Bay generators make around 3 liters of uncompressed gas per minute(under Ideal conditions). Your van needs 700-825 liters per minute to run at 60 mph. Even adding the 3 liters per minute would not provide enough offset in fuel supply to give the results you are saying it provides.3 liters isnt even 1% of the engines fuel requirement. I doubt it would give any increase in mileage whatsoever.