I'm undecided about this one. It's a modern upgrade of the "cow magnets on your gas line can dive you 200 mpg!" hype. On the up side, the researchers are from a reputable research institution (Temple University), but on the down side, the information provided is quite sparse and unclear. It also seems to have more than a few errors. Is is right that a Mercedes 300D engine is only producing 0.4 +/- 0.04 hp? Equation 1 is for a suspension, but it doesn't appear that anything is being suspended in the fuel.
Perhaps a patent is being filed, which could explain the lack of detail. Good luck in enforcing such a patent in the aftermarket. It would be an easy retrofit for existing cars, and only enforceable on new production.