E20 is a type of fuel blend that contains up to 20% ethanol and 80% gasoline. Ethanol is a renewable fuel made from plant materials, such as corn or sugarcane, which helps reduce greenhouse gas emissions compared to traditional gasoline. E20 is designed for use in flexible fuel vehicles (FFVs) that can run on various ethanol-gasoline mixtures. Using E20 can enhance engine performance and reduce dependence on fossil fuels. However, not all vehicles are compatible with this fuel blend, so it's essential for drivers to check their owner's manual or consult with their vehicle manufacturer before using E20.