How does Peugeot 307 1.6 clean up the carbon deposit by itself?

Take off the engine decorative cover, remove the throttle, clean it with carburetor cleaner, dry it with cotton cloth and install it.

Clean up the carbon deposit inside the engine;

Open the oil cover, pour the whole tank of cleaning agent (mixed with old oil), cover the oil cover, ignite the engine at idle speed 10 minutes, and then turn off the engine. Clean the carbon deposit inside the engine. This cleaner can dissolve the deposits such as sludge, colloid, moisture and metal debris inside the engine, reduce the pollution of new engine oil and prolong the service life of the engine.