I'm doing it for a mixture of reasons:-
I think ethanol is much better fuel than petrol, because even though it has lower energy density it's oxygenated so you get all the energy in it out, it will make petrol and diesel engines obsolete
I've got an astrocytoma and the American cancer society thinks air pollution from cars causes cancers and if we use less petrol our grand kids will have less chance of getting that type of tumour.
Ethanol is very nearly zero carbon footprint that means using it should reverse the effects of man-made climate change. The melting of the ice caps the more powerful weather events and the changing of the direction and power of the Gulf steam.
It doesn't take much training to make ethanol, after all before the Great war most American farmers had a still.
The oil companies have conned us they're selling fuel that causes cancer.
Unlike many environmentalists I wouldn't have a problem with people who have invested in oil companies if they would want to now re-invest in greener and more ethical companies.
Lastly there is a slight nationalistic component in that for every gallon of domestically made fuel sold, all of the money stays in the country. I don’t think we should be exporting a good part of our gross national product to other countries, when we could be making Ethanol here.
No foreign power could hold us to ransom.