Can I add oil directly without cleaning up the carbon deposit?

You don't need to change the oil. Cleaning up the carbon deposit will not affect the oil. Take off the engine decorative cover, remove the throttle, clean it with carburetor cleaner, dry it with cotton cloth and install it. The cleaning cycle of the throttle valve is 20,000 kilometers. Before refueling, add the whole bottle of fuel additive to the fuel tank, and the cleaning cycle is 30,000 kilometers. Carbon deposition in the engine includes carbon deposition in the air intake system and lubrication system, but most of the carbon deposition in the air intake system will not affect the phenomenon of engine oil burning during maintenance.

Is it necessary to clean up the carbon deposit in the old engine? Will the phenomenon of burning engine oil after cleaning be more serious?

If the carbon deposition in the local position of the intake system is serious, it can promote the full combustion of the mixture, restore the dynamic performance of the vehicle and improve the rationality of the fuel.

Is it necessary to clean up the carbon deposit in the old engine? Will the phenomenon of burning engine oil after cleaning be more serious?

However, for old cars (such as engines over 200,000 kilometers), it is still necessary to be careful to clean the lubrication system. For example, the oil sludge in the lubrication system is serious, and the engine oil is burnt out. Generally, it is not recommended to directly add cleaning agent to clean the intake air, sometimes it will affect the abnormal sound of the engine after cleaning.

Is it necessary to clean up the carbon deposit in the old engine? Will the phenomenon of burning engine oil after cleaning be more serious?

If the sludge in the lubrication system is strictly prohibited, the risk of directly adding cleaning agent to clean the carbon deposit is very great, and the cleaned sludge is likely to block the lubricating oil passage and affect the engine damage.