In recent years, vegetable oils are seen as a safe alternative to mineral oil–based lubricants. In the present work, preliminary evaluation of the physicochemical, corrosion, thermal, rheological, and tribological properties of Cucurbita pepo L. oil (CPO) were carried out and compared with commercially available mineral oil, SAE 20W40, and other vegetable oils. The yield of CPO was found as 54.85% with iodine value, acid value, and saponification value of 105.52 ±0.12 gI₂/100 g, 0.4 ±0.52 mg KOH/g, and 147.26 ±0.11 mg KOH/g respectively. Palmitic acid (13.98%), stearic acid (13.55%), oleic acid (19.53%), and linoleic acid (50.07%) were major fatty acids present in CPO. The pour and flash points of CPO were - 8±0.67 ° C and 323±0.11 ° C respectively. The viscosities of CPO were 55.39 cSt at 40°C and 11.15 cSt at 100°C. The viscosity index was 180. From the tribology tests, it was observed that the coefficient of friction and wear scar diameter of CPO (0.0459±0.0002 and 0.413±0.0389) were comparable to that of SAE 20 W40 (0.0506±0.0356 and 0.333±0.0202). The extreme pressure properties of CPO were found relatively inferior in comparison to SAE 20W40 due to the presence of commercial additive package in SAE 20W40; however, it was observed that tribological properties of CPO (coefficient of friction and wear scar diameter) were better than some of the commonly studied vegetable oils.

近年来，植物油被认为是基于矿物油的润滑剂的安全替代品。在本工作中，对南瓜属油（CPO）的理化，腐蚀，热，流变和摩擦学特性进行了初步评估，并将其与市售矿物油，SAE 20W40和其他植物油进行了比较。CPO的收率为54.85如用％碘值，酸值，和105.52±0.12的gI皂化值₂分别为0.4±0.52毫克KOH /克，和147.26±0.11毫克KOH /克/ 100克。棕榈酸（13.98％），硬脂酸（13.55％），油酸（19.53％）和亚油酸（50.07％）是CPO中的主要脂肪酸。CPO的倾点和闪点为-8±0.67°C和323±0.11°  C分别。CPO的粘度在40°C下为55.39 cSt，在100°C下为11.15 cSt。粘度指数为180。通过摩擦学测试，可以发现CPO的摩擦系数和磨痕直径（0.0459±0.0002和0.413±0.0389）与SAE 20 W40（0.0506±0.0356和0.333±0.0202）相当。 ）。与SAE 20W40相比，发现CPO的极压性能相对较差，这是因为SAE 20W40中存在商业添加剂包装。然而，据观察，CPO的摩擦学性能（摩擦系数和磨损痕迹直径）优于一些常用的植物油。