Zulkarnain, Akbar, Dehar Bagas Saefullah, Damar Isti Pratiwi, Dimas Adi Perwira, Arif Devi Dwipayana, and Triana Sharly Permaisuri Arifin. 2025. “Feasibility Study of Engine Oil Concerning the Kinematic Viscosity, Water Contamination, and Dissolved Solids Pollutants on Locomotive CC 206”. Jurnal Pendidikan Teknologi Dan Kejuruan 31 (1). https://doi.org/10.21831/jptk.v31i1.81436.