Putra, T. A. (2018). Comparison Analysis of Quality of Ax-7 Advance Shelling Lubricants and Pertamina Enduro Racing Lubricants on Kawasaki Ninja 250cc Injeksi Motor. Jurnal Teknik Mesin (Journal Of Mechanical Engineering), 7(3), 113–118. https://doi.org/10.22441/jtm.v7i3.4033