[quote=@Dinh AaronMk]
<Snipped quote by ClocktowerEchos>

I'm sure you could use ethanol too but corn is a very inefficient form of ethanol and without machines to farm the corn then turning corn or soy into fuel would be a severe waste of food crops.

And while Illinois has at least one major refinery it'd be something likely contested by Kansas it's so close to them.
[/quote]

That would be an issue. I would say biofuels but even today we aren't really implimenting those so that's off the table.

The contested refinery could be an interesting plot point tho.