Thank you for the respose.

Costs 10-15% more at the pump.
You get 10-15% less mileage in the car.
Potential problems with water (phase separation)
Creates problems in the food chain for some countries.
Keeps the Iowa corn farmers happy.

Why do we use it?
Politics, my friend, politics.

Diesel is the real short term answer.
But, then again politics, my friend, politics.

What will the long term solution be?
Politics, my friend, politics