http://www.wired.com/news/autotech/0,2554,69529,00.html HFI is a bolt-on, aftermarket part that injects small amounts of hydrogen into the engine air intake, said Canadian Hydrogen Energy's Steve Gilchrist. Fuel efficiency and horsepower are improved because hydrogen burns faster and hotter than diesel, dramatically boosting combustion efficiency. ********** Leave it to the Great White North to come up with this... Any fuel/air experts able to comment of the effects of burning hydrogen with the ICE in the Prius? Since the HFI uses the vehicles electrical system to complete the electrolysis, sounds like it would be great for the Prius. Any comments or suggestions?