We here have two alternative fuels for cars. One is methanol (called plainly alcohool here), which costs about half of what regular petrol does. It was developed here during the oil crisis of the 70s. There are few cars equiped to run only on methanol, but there are lots of cars with engines capable of running on both regular petrol and methanol, and even at the same time...

The other would be propane or butane or other gas (not gas as gasoline, but "gas" gas). It's quite cheap, you can run 100 miles with 5 dollars of it. Some cars are also adapted to run on both. Problem is, it's expensive to turn your car into one of those, and it takes out the space in your trunk. Most of the cars that run on this kind of fuel are taxi cabs, but there are some people who have those on their own cars, I know a few who do.

Now, my question is: where you live, is there an alternative source of fuel? Now, for those conservatives who say "screw the nature I wanna burn some petrol and polute the world", I say that I'm asking this not because of the environment issues, which I know you don't care about, but based on the PRICE of fuel these days. The two alternatives are cheaper than regular petrol, are there any alternatives?

(Of course, there's also diesel, but I don't remember how much it costs)