In light of the Water-Powered Engine thread...thought I'd put one here. Car supposedly runs on air, holds 8 or 9 gallons of fuel and can go 800 to 1000 miles on one tank full. Air-Powered Car Coming to U.S. in 2009 to 2010 - Zero Pollution Motors - 1000-Mile Range - Popular Mechanics It doesn't say exactly how it works, but I am guessing the fuel runs a high-pressure air compressor, and the engine is run off of the compressed air. Car is kinda FUGLY, but better than the crappy mileage we get now. hehe. Here's to hoping Big Oil doesn't make these guys dissappear!