Abstract: The economy has grown rapidly Indonesia in the last two decades. This growth has increased the ownership of passenger cars. The number of users of passenger cars is predicted to grow dramatically in Indonesia in the future. To reduce fuel consumption in the transport sector, the department of energy and department of transportation should consider implementing minimum fuel economy standards for passenger cars. This paper attempts to predict the potential mitigation of emissions through fuel economy standards for passenger cars. The calculations were based on the growth of passenger cars ownership data. The study found that the fuel economy standards for passenger cars would mitigate a significant amount of emissions in the country.