Hernando, R. et al. 2026. An Experimental Study on the Effect of Oil Viscosity Variation with Engine Additive on Working Temperature, Viscosity Change and Fuel Consumption of a 4-Stroke Gasoline Engine. International Journal of Science, Technology & Management. 7, 4 (Aug. 2026), 487–492. DOI:https://doi.org/10.46729/ijstm.v7i4.1445.