Thermal management is vital for optimizing the performance, lifespan, and safety of electric vehicle (EV) battery packs. This paper experimentally explores the use of mineral oil as a thermal regulation medium for EV batteries under Jordanian climate conditions. The study includes analyses of the electrical and thermal behavior of battery cells at different temperatures, the compatibility and impact of mineral oil on battery materials, and the practical feasibility of integrating such a system within an EV module. Battery testing was conducted under three cooling conditions: no cooling, air cooling, and mineral oil cooling. The electrical behavior of the battery was studied across these three cooling cases under 0.5C and 1C discharge rates, as well as under a 0.5C charge rate. The results indicate that mineral oil significantly moderates the battery temperature, keeping it within optimal operational ranges compared to other cooling methods. Specifically, the temperature delta is reduced by 50% at a discharge rate of 0.5C, while temperature uniformity is maintained within 2°C. This study designs and utilizes a mineral oil cooling system to investigate the thermal behavior of an existing battery module from the HTU student Racing Formula Team under Jordanian climatic conditions. The ambient temperatures during the testing period ranged between 28°C and 34°C. The findings suggest that mineral oil cooling is a feasible solution for improving the thermal management of EV batteries under variable conditions.