Compressed Natural Gas

Stroker, you cannot change the "laws of physics." If you compress it to higher pressures, you need thicker, heavier tanks, ala welding tanks, or liquify it, then you need special thermal tanks like used for LOX or NOX.

I used to service HVAC/R, and frankly, I could not be interested less in having a high pressure tank of LP/ NG in my trunk

Well.....I know technology changes everyday. I don't know anything about LNG other than the tank size is large. There are always new things coming out. I was thinkin maybe somebody had come out wif sumffin, know what I mean? I could see usin it with a truck.....but a car? You'd lose any storage space. Plus, it's just not practical considering there are few places to refill.