Is it necessary to clean the throttle valve and nozzle after the four guarantees?

If it is used in cities, it is best to clean the oil supply system every 5000 kilometers for cars that often travel short distances. One way is to increase the speed, and increase the internal pressure and oil quantity of the engine to wash away the carbon deposits or colloids (including fuel nozzles, throttles, cylinders, etc.). ). Another method is to choose 3M brand four-in-one special cleaning agent for automobiles from larger supermarkets or reputable automobile supplies stores and use it according to the instructions. Cleaning in 4S stores is too expensive. Last time it was 13000 km, and next time it should be 18000 km. Just change the oil and machine filter. If it reaches 20 thousand kilometers, it is necessary to replace the air filter and air conditioning filter element; Replace the wheels every 10000 km; Replace antifreeze every two years. If the car deviates, it needs four-wheel positioning; If the car is shaking at a certain speed, the wheels should be dynamically balanced. I suggest you read the instructions again in detail.