There is provided an emulsifier comprising at least one C8 to C18 fatty acid diethanolamide, at least one C12 to C24 fatty acid, at least one C6 to C18 alcohol ethoxylate and optionally at least one sorbitan ester and/or at least one alkylene glycol monoalkyl ether. There is additionally provided emulsions comprising a fuel, water and an emulsifier and methods of producing emulsions.