How often does Mazda Enceladus engine clean up carbon deposits?

If the engine has serious carbon deposition, it will change the original structural parameters of the engine, reduce the engine power and increase fuel consumption; In severe cases, it will cause the engine to knock, accelerate abnormal sound, damage the piston and crankshaft, and even eventually lead to the need for overhaul of the oil. How often do you clean up car carbon deposits? This situation will be different according to different models, generally speaking, 4 S.