Ethanol fuel comes in a few forms.

From Ethanol.org

Also referred to as ethyl alcohol, grain alcohol, or ETOH, ethanol is a clear liquid with an agreeable odor. Ethanol is made by fermenting and distilling simple sugars. Today, ethanol is a fuel produced from crops such as corn, grain sorghum, wheat, sugar, and other agricultural feedstocks. Most fuel ethanol produced in the U.S. is derived from corn—latest figures indicate that just over 10% of the U.S. corn crop is dedicated to ethanol production. In Brazil, the world’s top producer of ethanol, sugar is the primary feedstock. Since it is produced from crops or plants that harness the power of the sun, ethanol is considered a renewable fuel.

Pure fuel ethanol contains chemical properties identical to that of other grain alcohol. As such, it must be denatured or made unfit for human consumption. In the U.S., the most common denaturant is gasoline. There are three major types of fuel ethanol:

E95 : Pure ethanol, or the alcohol produced in an ethanol production facility. E95 must be denatured so humans cannot consume it. While it can be used by some vehicles in its pure form, most E95 is currently blended with gasoline for resale in petroleum markets.

E85 : A mixture of 85 percent ethanol and 15 percent gasoline, E85 is a leading alternative fuel used in the U.S. Over 3.5 million autos run on E85 fuel, and it can be purchased at approximately 200 refueling sites in the U.S. When E85 is not available, these “flexible” fuel vehicles can operate on any blend of ethanol or straight unleaded gasoline.

E10 : The most common from of ethanol, E10 contains 10 percent ethanol and 90 percent gasoline. Nearly 3 billion gallons of ethanol is consumed each year in the U.S., the vast majority of which is E10. All automobile manufacturers in the U.S. approve the use of E10.

Approximately 30% of all gasoline consumed in the United States was blended with ethanol in 2004. Because the ethanol molecule contains oxygen, it allows an auto engine to more completely combust fuel, resulting in fewer emissions. Fuel ethanol blends are successfully used in all types of vehicles and engines that require gasoline. Approval of ethanol blends is found in the owners' manuals under references to refueling or gasoline.

So yes, what's used in auto's is a blend, but E85 is a HUGE step towards weening ourselves off oil.