Just heard a podcast on this very thing -
NG, even compressed, is “fluffier” than vaporized gasoline.
It has about 80% of the energy per volume entering the combustion chamber.
But, folks, at 75 cents per gasoline gallon equivalent, gimme a break! I’ll take the “gotta push my foot down 20% more” problem.
On topic, though - since NG will work, and electric cars will not, look for the left to support electrics over NG.
Same problem ethanol has. But if you make a gallon of ethanol for half the price of gasoline (real price, not subsidized because I have to pay for the subsidy on April 15) I'll accept having to fill up a little more often. Same for natural gas.
However, don't rely on costs staying at their current low point. If more people start using natural gas then prices will go up. Also, we produce a lot of gas but it is difficult to export so there is no intercontinental market for it like there is in oil. Start building some ports and ships to handle it and our prices will come closer to the European and Asian prices.