Hasan, H.A., Al-Sumaidaee, S.A.K.M. and Abdul-Munaim, A.M. 2025. Diesel Engine Efficiency under Varying Loads and Engine Oil Contaminated with Safe levels of Glycol. Basrah Journal of Agricultural Sciences. 38, 1 (Jun. 2025), 20–29. DOI:https://doi.org/10.37077/25200860.2024.38.1.2.