eng Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 2019-12-21 7 4 195 200 10.12691/ajme-7-4-6 AJME2019746 article Marsyaelina A Anggie0302pasca.2018@student.uny.ac.id 1 Z. Arifin 2 S Sutiman 2 M. Solikin 2 R. Iskandar 2 Technological and Vocational Education, Yogyakarta State University, Indonesia, Automotive Engineering Education, Yogyakarta State University, Indonesia Vechiles emit large amounts of emissions in towns of developing countries. This study is descriptive research. Analyzer gas as well as opacity were used to collect the necessary data. The objects of the study were motorized diesel engine as well as gasoline engine of various brands that operated around Sleman, a regency in Special Region of Yogyakarta, Indonesia. Those vehicles produce three main exhaust gases: CO, HC, and PM. The largest CO emissions, with figure reaching 6.92%, come from gasoline-powered Suzuki units released in 1993. Daihatshu units released in 1993 emit the largest HC emissions up to 538 ppm. Meanwhile, diesel-powered vehicles that produce the most Particulate Matter come from Mitsubishi that were released in 2008, with figure reaching 64.55%.HSU. The analysis of exhaust gas emissions will encourage vehicle owners who haven't yet passed their emission test to do regular maintenance as well as put the right type of fuel into their vehicles. http://pubs.sciepub.com/ajme/7/4/6/ajme-7-4-6.pdf CO diesel-powered vehicle emissions exhaust gases gasoline-powered vehicle HC particulate matter