Originally Posted by
tandempower
Presumably ethanol is still being added to gasoline, but I'm not sure at what point that becomes unprofitable.
Ethanol isn't added to increase profitability, it's added to create an outlet for all the excess corn the government subsidizes. It was ostensibly first used to reduce the need for fossil fuels, although the net gain in that regard is insignificant at best. It has remained a component of gas sold in the US primarily because the first Presidential primaries are held in Iowa where no one dares to speak against corn subsidies.