More commonly known as regular 87 octane, E10 contains 10% ethanol and 90% gasoline. E10 is approved for all vehicles and small engines.
Minnesota, a longtime national leader in ethanol policy and development, was the first state to require the use of ethanol in its fuel supply. Today, Minnesota law requires all gasoline sold in the state to contain 10% ethanol. Currently, 97% of the fuel sold in the U.S. includes 10% ethanol.