How long will it take for fuel consumption to return to normal after cleaning the throttle?

How long will it take for fuel consumption to return to normal after cleaning the throttle? Fuel consumption will return to normal after driving for 50 kilometers. Failure to clean will cause the following consequences: 1. If the throttle valve is not cleaned, air will flow through the throttle valve, and naturally a lot of dust and sand will enter the throttle valve; 2. In addition to the oil vapor discharged from the crankcase, black putty deposits are formed, which affects the inflexibility of the throttle; 3. If the throttle valve is not cleaned, a lot of impurities will be mixed into the air entering the engine, which will affect the normal combustion of gasoline and reduce the working power of the engine. If it is strictly prohibited, there will be problems such as unstable idle speed, difficult start-up and power drop.