Butanol may be used as a fuel in an internal combustion engine.
"Wikipedia"
Plans are underway to market a fuel that is 85% Ethanol and 15% Butanol (E85B), so existing E85 internal combustion engines can run on a 100% renewable fuel that could be made without using any fossil fuels.
"Wikipedia"
Butanol has been demonstrated to work in vehicles designed for use with gasoline without modification.
"Wikipedia"