It's 10%, and at 10% you don't have any change. It's not that 10% is 2.5% because 85% is 25%; it doesn't work like that. Because of the higher octane level of ethanol, at 113, it boosts the octane level of the rest of the gasoline. That offsets the energy loss when you're looking at 10% blends, and 10% blends are what we use in our gas today. One-third of the fuel in the United States is 10% ethanol blend.
Literally billions of kilometres driven, with lots of testing and no energy loss or mileage loss at that rate--