Situmorang, A.R. and Tulus 2026. Numerical Simulation of Effective Viscosity Distribution of Power-Law Engine Oil in Piston–Cylinder Lubrication Under High Shear Conditions. Journal of Research in Mathematics Trends and Technology. 8, 1 (May 2026). DOI:https://doi.org/10.32734/jormtt.v8i1.24922.