The only solution is to get off petrol and go onto gas. Gas still is 45 cents locally for me and shouldnt hit 70 cents until 2011-15.
Beyond that CNG (car no go) with a serious turbo. Otherwise you have to get a diesel and run your own bio-diesel which means spending 1 day a week producing it, so no thanks and diesel engines (except the audi le mans car) are as thrilling as a citroen 2cv.

We need the Russian engine develped in secret by Joseph Papps (he himself was hungarian militant in the past when he came into possession of Russian secret technology) which he took to his grave with him due to severe paranoia and maybe a mental condition never diagnosed (like many ingenious people in the past and present). He didnt trust a soul, made his millions from investors, revealed the mechanical design of it but never the noble gas mix which ran it and only he new till he contracted cancer and kicked the bucket.
Papps engine (a modified sealed volvo engine) on a dyno in front of investors, engineers and others made 10 times the torque and power of a normal engine.
The sealed gas mix in the bores expanded and contracted with a series of ignition pulses and needed no fuel to run beyond the special gas filled cylinders. Also produced no emissions.
There are several companies and government agencies trying to find the noble gas mix he used but have been unsuccessful yet.
One of his investors pulled the leads of the engine against Papps wishes during a demonstration and it ran on by itself. As Papps fought with the investor to put back the leads( due to the nature of the engine which only Papps knew how it worked) the investor refused Papps tried to turn the engine off but it exploded shooting a rod or something at someone standing by.

After reading and seen all the videos of his engine and life, you can see that Papps definately had something worth billions (he new that too obviously) he kept the noble gas mix secret so he obviously wouldnt disappear from the face of the earth as other have in the past, he went crazy a few times, trusted no one and now the world still pays politician wages they dont deserve for going A - B.

http://agabatti.blogspot.com/2006/03/joseph-papps-noble-gas-engine.html