Gasoline price fall in Covid-19 outbreak. Petrol station sign in Detroit, Michigan, USA, showing gasoline to be significantly cheaper than E85 ethanol fuel blend due to the Covid-19 coronavirus pandemic. E85 is a blend of gasoline and up to 85 per cent corn-based ethanol and is usually cheaper than gasoline. In the United States, about 40% of the corn crop is used to make ethanol. Photographed in April 2020.