The four main types of lubricating oil include the dual-purpose diesel and petrol engine oil series, heavy-duty diesel engine oil series, automotive gear oil series, and industrial hydraulic oil series. Dual-purpose diesel and petrol engine oil is suitable for both petrol and diesel engines, effectively reducing friction and extending engine life, while heavy-duty diesel engine oil is specifically designed for high-load diesel engines, providing enhanced anti-wear properties and high-temperature stability. Automotive gear oil is primarily used in transmissions and differentials to ensure smooth operation of the gear system and prevent metal fatigue, while industrial hydraulic oil is widely applied in hydraulic systems, featuring superior oxidation resistance and demulsibility to withstand high-pressure environments. When selecting lubricants, it is essential to match the viscosity grade (e.g., 5W-30, 10W-40) and performance specifications (e.g., SN, SP) according to the specific requirements of the vehicle or equipment, and purchasing through authorised channels is recommended to guarantee product quality.
