I also noted that at least one of the HHO sites I found offered hypermiling tips:
"BONUS #3 - HyperMiling - The Art of Driving To Save Fuel
Through extensive trial and error, many techniques have been discovered that can as much as double your fuel economy just by driving a certain way. Some of these techniques were featured on CNN and the complete guide has been sold for as much as $79.99. Combined with the Gas4Free system, this allows MAXIMUM GAS SAVINGS.
Value: $79.95 yours FREE"
This is how the fuel line magnets work. They sell you a worthless product, but since you are known to want to increase fuel mileage, they give you a little education in how to do that. Then they want to take credit for their device improving your gas mileage.
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