The Effect of Gasoline-Bioethanol Blends to The Value of Fuel’s Octane NumberCahyo Setyo Wibowo, Bambang Sugiarto, Ardi Zikra, Alva Budi, Try Mulya and MaymucharE3S Web Conf., 67 (2018) 02033DOI: https://doi.org/10.1051/e3sconf/20186702033