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Impurities in gasoline are the main components of carbon deposition, so the trend of carbon deposition is weaker when clean gasoline is formed. But pay attention to high labelling is not equal to high quality, labelling only represents the octane number of oil, and can not represent the quality and cleanliness. 1. Using clean gasoline, some owners will add gasoline in order to ensure the cleanliness of the gasoline. This can effectively prevent the formation of carbon deposits on the metal surface, and can gradually activate the original carbon particles and slowly remove them, thus protecting the engine from damage. However, the addition of gasoline cleaners must be cautious. If you add fake products, you will get the opposite effect. 2, do not have long idle speed for long idle time, the time needed to reach the normal temperature is also longer, gasoline is sprayed to the back of the valve back, the speed of evaporation is slow, and the carbon product also comes from it. At the same time, often idle speed, the air flow into the engine is also small, so the scour effect of carbon deposition is also very weak, will promote carbon deposition. 3, pay attention to the timing of the flameout for a vehicle equipped with turbocharger, do not extinguish the fire immediately after high speed or climb the slope, and then extinguish the fire after 10 minutes at the idle speed, and the car equipped with turbocharger has a speed of several times faster than the natural suction type car. It is suggested that the car people do the free cleaning of the intake system every 20 thousand to 40 thousand kilometers under the condition of routine satisfaction, that is to use special equipment for the operation or selection of carbon in the parts of the vehicle, such as the intake port, the valve, the oil road and so on, when the engine is not disintegrated. The brand's fuel system cleaner clears carbon deposits on vehicles.