Should the Great Wall C30 use 5w30 or 40?

[VincentDella]

The Great Wall C30 can use 5w30 engine oil, as all models of the Great Wall C30 are equipped with a 1.5-liter naturally aspirated engine. There is no need to use 40 viscosity oil for a naturally aspirated engine. Engine oil is referred to as the blood of the engine; without it, the engine cannot operate. When the engine is running, the oil forms a thin film on the surfaces of various components inside the engine, preventing direct contact and friction between them. If the engine components come into direct contact and friction occurs, it can generate a large amount of heat instantly, potentially causing engine damage.