I have been looking around the internet, and came across THIS I wonder how this can apply to our vintage Mustang?

 

I think if I got rear ended I'd rather get blown up the old fashion way, with gas...

seriously though, it'd probably cost a lot of money to convert, not to mention the availability problem.... Anyone tried propane? I was thinking about it for my Jeep, but not for the stang.

 

I used butane in my old pickup truck. Heck, even Butane is getting out-of-sight expensive. Here is a car that runs on compressed air. But, it would probably take more fuel to compress the air than it would to run a fuel engine. http://www.theaircar.com/