What is ethanol & ethanol-blended fuel?
Ethanol is highly refined beverage (grain) alcohol, approximately 200 proof, and can be made from natural products such as corn, sugar, and wheat. Ethanol that is used for fuel has been denatured with hydrocarbon, rendering it unsafe to drink.
Ethanol-blended fuel is a mixture of ethanol and unleaded gasoline. A mixture of 10% ethanol with 90% unleaded gasoline is known as E10 (E for ethanol, and 10 for 10%). Automobiles that normally use unleaded gasoline for fuel can also run using E10 fuel. Another type of ethanol-blended fuel is E85. E85 refers to a mixture of 85% ethanol and 15% unleaded gasoline.