The decreasing number of non-renewable fuel supply due to the very high use of private transportation leads many of researcher to make some innovation in order to improve the fuel consumption efficiency. The fuel consumption is related to the amount of air and drags force that passes through the body shape transportation. Based on the theory that we have been learned, the higher drag force on transportation body the higher fuel consumption, since the higher amount of drag force causing the transportation need more energy to form some speed power. One of the technologies which can reduce the aerodynamic drag force is the application of synthetic jet actuator of flow active control as a modification of simple transportation model in order to reduce the aerodynamic drag on transportation model. The focus of this research is the experimental analysis of the effect orifice diameter variations of the conical shape cavities synthetic jet application on reversed Ahmed Body model. The independent variables that applied in this experiment are the variation of the square, triangle, sine wave frequencies that range from 90 Hz to 130 Hz with the frequency interval is 10 Hz, and the wind airflow velocities which ranging from 40 km/hour to 60 km/hour. The free variable is the orifice diameter of cavity variations, there are 3 mm, 5 mm and 8 mm. This research is focused on experimental method, and based on the recent experiment, the square wave type with a frequency 110 Hz has the highest drag coefficient reduction percentage for the orifice diameter 3 mm and 8 mm, the value coefficient drag reduction percentage is 9.93% for 3 mm orifice diameter and 8.37% for 8 mm orifice diameter. For 5 mm orifice diameter has the optimum percentage coefficient drag reduction and its value is 5.58%.