Do you need to change the oil after visually cleaning the engine carbon deposit?

You don't need to change the oil. Cleaning up the carbon deposit will not affect the oil.

The carbon deposit cleaning project includes the following aspects:

1. Clean the throttle, remove the engine trim cover, remove the throttle, clean it with carburetor cleaner, dry it with cotton cloth, and install it. In general, the cleaning cycle of the throttle valve is 20,000 kilometers.

2. Clean up the carbon deposit inside the engine, open the engine oil cover, pour the whole tank of cleaning agent (mixed with old engine oil), cover the engine oil cover, strike the fire and idle for 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.

3. Clean up the carbon deposit in the oil circuit, and add the whole bottle of fuel additive to the fuel tank before refueling. Usually, a bottle of fuel additive is used in a 50-80 liter fuel tank. Cleaning the carbon deposit in the oil circuit includes cleaning the fuel injector, combustion chamber, spark plug, throttle and other parts.

4. Clean the carbon deposit in the air intake system, buy a bottle of cleaning agent for the air intake system, pour it into the liquid storage tank of special cleaning equipment, connect the air intake system, and suck the cleaning agent into the air intake by vacuum to achieve the purpose of cleaning. Cleaning the carbon deposit in the intake system mainly refers to cleaning the carbon deposit in the intake and intake manifold.