How Often Should Carbon Deposits Be Cleaned?
2 Answers
Carbon deposits should be cleaned every 10,000 kilometers. Vehicle owners can decide based on their driving conditions. If driving predominantly on highways, the interval can be extended to 30,000 to 40,000 kilometers. For other drivers, cleaning can be done every 20,000 to 30,000 kilometers, with variations depending on the vehicle model. Carbon deposits refer to the incomplete combustion of fuel in the engine, forming hydrochloric acid and resin-like gums under high temperature and oxygen catalysis, which adhere to component surfaces. These deposits further concentrate under high temperatures into complex mixtures such as asphaltenes and oil coke. Carbon deposits can be categorized into valve and combustion chamber deposits, and intake pipe deposits.
I've been driving for over twenty years, and there's no fixed schedule for carbon deposit cleaning—it really depends on your daily driving habits. For example, if you frequently drive in congested urban areas with constant stop-and-go traffic, carbon deposits can build up faster, so you might need to check every 10,000 kilometers. I usually use fuel additives to help reduce carbon buildup on engine components, and I feel like the car runs smoother with more stable fuel consumption. If you notice difficulties starting the car, reduced power, or shaking during acceleration, that's carbon deposits causing trouble—don't delay, get it cleaned at a professional shop right away. Otherwise, a minor issue could turn into a major repair, costing you more. During regular maintenance, remember to mention carbon deposits to the technician. They can use an endoscope to inspect the intake valves and help you see the actual condition.
