Butanol Fuel
Butanol may be used as a fuel in an internal combustion engine. Because its longer hydrocarbon chain causes it to be fairly non-polar, it is more similar to gasoline than it is to ethanol. Butanol has been demonstrated to work in vehicles designed for use with gasoline without modification. It has a four link hydrocarbon chain. It can be produced from biomass (as "biobutanol") as well as fossil fuels (as "petrobutanol"); but biobutanol and petrobutanol have the same chemical properties.
Read more about Butanol Fuel: Distribution, Properties of Common Fuels, Potential Problems With The Use of Butanol Fuel, Possible Butanol Fuel Mixtures, Current Use of Butanol in Vehicles
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—Henry David Thoreau (1817–1862)