How about the oil at Shangjiao gas station in Chang 'an, Dongguan?

No, Shangjiao Gas Station is a small and informal gas station. The oil there may be mixed with water oil, or it may be mixed with formaldehyde and chemical pigments melted by water. The oil is quite poor, which is harmful to the car. These so-called blending oils are petroleum with insufficient octane number, and some chemical raw materials will be fine. Even worse, dirty oil refers to oil with high gum and wax content, mixed with a lot of impurities, which will do great harm to the engine.