Abstract: The production of biodiesel is labor and time intensive. A first catalyst and a second catalyst were used for a two step transesterification of used oil to make biodiesel. The ratio of second catalyst and alcohol determines the outcome of good quality biodiesel that meets the ASTM standards. Several experiments were conducted to find optimal second catalyst, second catalyst alcohol ratio, and different times for adding second catalyst and alcohol either in sequence or simultaneously. Potassium hydroxide as a second catalyst and methanol as an alcohol, in a specific ratio calculated based glycerin value dictated the final volume. Specific ratio of catalyst and alcohol, when added together for a short duration lasting for minutes, instead of hours, produced superior quality biodiesel. The biodiesel production was stable and consistent. The production time was reduced considerably. Truncated method of producing biodiesel has tremendous cost and time advantage.