What should I do if the Great Wall C50 is noisy?

This phenomenon is not an individual phenomenon. Generally speaking, after driving for a while, it will definitely be louder than a new car. The main reasons are as follows: first, the quality of engine oil is poor, so it is recommended to change it better; Second, the quality of the engine foot (rubber pier) is poor, which hardens after a long time, and the shock absorption effect becomes worse, transmitting more engine vibration to the carriage; Third, there is too much carbon deposition. Due to the poor quality of gasoline, long-term low-speed driving, carbon deposition in spark plugs, throttle valves, fuel injectors and other parts will also increase the noise of the machine, which is often accompanied by increased jitter and increased fuel consumption. Please find and exclude the same.