Wait a few more years and you will have a LOT more options.
Also have you weighed the added investment, cost of insurance, cost of maintence and things as such into your figuring efficiency?
People have been fueling on ethanol thinking they were saving large amounts, when it is quite neglegable when you look at the reduced MPG and it is a losing situation when you look at the added costs of food and other items because of the big ethanol push.