Musakhi, F. and Gamayel, A. 2025. Effects of Soybean and Olive Oil Additives on the Physical and Frictional Properties of Synthetic 5W/30 Oil. Journal of Global Engineering Research and Science. 4, 1 (Jun. 2025), 27–33. DOI:https://doi.org/10.56904/j-gers.v4i1.159.