I placed an online order with Mileage Shop on 04/01 for (1) one of their Hydrogen on Demand generators. I received it within a reasonable time and proceeded to install it on my vehicle. I own a 1996 Jeep Cherokee XJ with the 4.0L EFI engine. I was presently getting on the average of 15-16 mpg combined city/highway. I was led to believe by the sales representative that I could expect at the least a 45% - 60% increase in mileage after installing the HHO generator. I continued to call back the Tech Support (6-8 times in the last two months) after the initial 1000 mile break-in period. But after the 1000 mile break-in period / initial flush of the unit I started to asking for what he would suggest me to do to increase my MPG's. We proceeded to start increasing at 5 Amps and increased the Amps by increments of 5 amps at a time until we reached the maximum of 15 Amps. Looking for that "sweet spot " that they spoke of where I would get the increase in MPG's. I was told to not exceed 20 Amps because it would create Steam, and defeat the purpose of increased MPG's. I requested an e-mail address of someone who had a vehicle similair to my vehicle so I could correspond with them to see how " they " corrected their problem with the performance of the generator, BUT was not given that information. I have put over 3000 miles (10) TEN - 20 gal tanks of gas) in this vehicle after purchasing this HHO generator with absolutely " No Substantal " increase in MPG's what so ever. I would not recommend a person to consider the purchasing this product. I don't feel that I'm the only person that has encountered this problem with the Mileage Shop.
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