[Abathar]

Buy a tank of hydrogen and a tank of oxygen and bubble it through a pipe in your gas tank. Of course adding pure oxygen to something like gasoline is a recipe for a major explosion, so be careful not to blow yourself up.

Seems to me it would drop the octane rating of the gas, causing it to knock and premature ignite, like cheap gas does. Making the gas more explosive is easy, slowing it down just a touch is what you pay more money for at the pump.

[trashcanbred]

Buy a tank of hydrogen and a tank of oxygen and bubble it through a pipe in your gas tank.

Don't forget to keep the tanks far apart, like these guys do.

[NormB]

You bring up a great point, and something I never knew before about just what "octane" means...
http://auto.howstuffworks.com/question90.htm

So even if the explosive capability of gas is replaced the issue of controlling it under compression is another engineering hurdle. Sounds like a new type of engine is required. I wish I was smart...