► Water-containing ethanol was mixed with diesel using biodiesel and butanol as stabilizer and co-solvent, respectively. ► Fuel blends with 4 v% water-containing ethanol, 1 v% butanol, 5–30 v% biodiesel and conventional diesel yielded a stable blended fuel after more than 30 days. ► Due to more complete combustion and water quench effect, target fuel [...]