Well Rosie it was two fold, and I'll bring you up to speed.
The most important was that Ethanol is corrosive, and Henry didn't have a lot of materials to use in storing and delivering it in the car. We don't have that problem today.
The second is that the domestic oil boom was emerging in the southern plains, that would be Oklahoma and parts of Kansas and Texas Rosie, providing what appeared to be endless supply of crude. The lack of a realistic supply of crude is a problem today.