Mujab S, Al Banna NH, Shofiah S, Pranoto E. Analysis of Valve Clearance Variation Effects on Exhaust Gas Opacity in Biosolar-Fueled Mitsubishi L300 Diesel Engine. Jurnal Perintis. 2026;2(1(Januari-Februari). Accessed May 28, 2026. https://ejournal.pktj.ac.id/index.php/perintis/article/view/42-47