Th refiner IS the blender. Google the law and you will find tons of information pointing at the politics and even some science disputing the benefit. Engine design would need to dramatically change to use high amounts of the ethanol pollutant! The Blend wall is 9.7%. We are over that and the lobby wants to go higher.... corrupt lobbying! https://www.scientificamerican.com/article/ethanol-fuels-ozone-pollution/