It has been done the research about “The Characteristic Mixtures Biodiesel From Ketapang Seed Oil (Terminalia catappa Linn) With Solar Using NaOH Catalyst“. The purpose of research is to determine the optimum condition blending biodiesel from ketapang seed oil with solar. Biodiesel 0%, 5%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85%, 95%, 100% which characterized by using method of ASTM (America…