As oil reserves dwindle and gasoline prices continue to climb, the value of renewable alternative fuels increases. On the cutting edge of this transition are biofuels - renewable because they grow from the earth through water and sunlight. Algae oil is a particularly promising source of biofuel, which can produce in three days what it takes nature over a million years to produce!
For a gasoline engine, you can make ethanol, even out of agriculture waste! Did you know that with a conversion kit, all diesel engines can be fueled with straight vegetable oil? That's oil you can grow yourself, use an oil press to extract, and even power a generator with.
Oil is available to buy at low cost from a wholesaler or farmer, or very popular - to get for free by collecting and filtering waste vegetable oil from restaurants! You can also use homegrown or recycled vegetable oil to make biodiesel - which runs in diesel engines without modification, save for a few switched hoses on vehicles older than 1994.
Check out the biofuel options below to see what your fuel can evolve to be!