Why do we still need a mandate then. Let the market decide. Why did we need the blenders credit.
There are plenty of refiners that are not oil companies, so don't tell me about some oil company conspiracy to rule the world nonsense. If ethanol makes economic sense it will continue to be used. And who is going to invest in the R&D needed for an alternative when we have the mandate, no one is that stupid.

edit there are other was to make ethanol besides corn.