It is also the oil companies, they know we can grow Bio-diesel and it would drive down the price of fuel. So they support the cash cow of ethanol. The politicians really don't give a damn about the voters, it is all about who gives them the checks and the hoes.
But the oil companies own most all of the commercial bio diesel plants here.
And yes, you can make your own bio diesl, but you have to be very careful making it. Even though these engines can burn it without modification, it has to be made to the right grade standards, or else you WILL destroy the fuel injector, which are extremely expensive on these new diesel engines.
That's why an old VW diesel rabbit engine is so popular, they were much more forgiving with badly made home made diesel.
You spelled that wrong, it is the checks and the HO's. Hoes are for those who work to pay for the HO's.