What items does oil cleaning include?

Oil cleaning mainly includes nozzle and throttle: 1. It is generally recommended that the cleaning frequency of automobile oil circuit is 30000-40000 km/h. According to the domestic oil channel factors, it is best to clean the throttle, nozzle and oil channel every 20,000 kilometers. 2. There is a nozzle in the cleaning oil circuit, so it is necessary to clean the air inlet, that is, the section from the throttle to the air inlet of the engine, which can be cleaned without disassembly; 3, and according to their own driving conditions and vehicle conditions, increase or decrease appropriately, such as: urban road congestion will accelerate _ road congestion.