The research has been done on the effect Of Variation Of Methanol Amount And Temperature On The Biodiesel Characterization Of Ketapang Seed Oil (Terminalia Catappa Linn) Using KOH Catalyst . Variable (oil : methanol) was 50:50, 60:40, 70:30, 80:20, 90:10 at temperature 40°C, 60°C, 80°C. The resulted biodiesel than were tested including parameters of density, flash point, cetane index, viscos…