An Ausie invented a pulsed EM device that broke hydrocarbon chains down into lighter compounds which converted bad gas into good useable gas, and made good gas great gas, much better gas mileage. This device is now used to turn heavy crude into sweet light crude. It was just a coil of copper wire wound around a fuel hose, driven by a free running oscillator.

I believe this same Ausie invented a vortex fuel atomizer which atomized fuel much better than anything currently being used.

Ionized intake air:
http://www.freepatentsonline.com/6675780.pdf

Lots of possibilities here:
http://www.freepatentsonline.com/res...it=&patents=on