What viscosity engine oil should be used for the Great Wall Wingle 7 diesel version?

[Felicity]

Great Wall Wingle 7 diesel version uses engine oil with the specification 5W-40. Introduction to engine oil: Engine oil, also known as engine lubricant, serves multiple functions including lubrication and friction reduction, auxiliary cooling, sealing against leaks, rust and corrosion prevention, as well as shock absorption. Selection of engine oil viscosity: Most diesel engines use 50-grade oil, and 0W40 oil is also acceptable. However, oils with viscosity below 40 must not be used. When selecting engine oil viscosity, factors such as the vehicle brand, condition, mileage, and operating environment should be considered to choose the appropriate oil. Therefore, it is recommended to refer to the vehicle's manual and consult professional technicians at authorized service centers to ensure the correct engine oil viscosity is selected.