The product is a differential oil manufactured by MOTUL with the part number 105778. This specialized fluid is designed for use in automotive differentials to help lubricate and protect the gears within the differential system. Differential oil plays a crucial role in maintaining optimal performance and longevity of the differential, which is responsible for transferring power from the engine to the wheels. It is essential to use high-quality differential oil like this one from MOTUL to ensure smooth operation and minimize wear on the differential components.