What brand of engine oil has good carbon removal effect?

Personally, I think Shell will do better in removing carbon deposits from engine oil additives: 1 and MotorProtector, also known as engine oil additives, are professional additives specially designed for engines. Engine protectant can effectively lubricate the engine and enhance the quality and durability of engine oil, thus achieving the purpose of protecting the engine; 2. The content of additives in lubricating oil is based on meeting the extremely low requirements of API (good cost performance in mass production), while high-grade lubricating oil is not based on good effect and cannot be directly used in cross-country rally or formula F1; 3. By using engine oil additives, the performance of engine oil is improved to a higher level, and at the same time, expensive components in lubricating oil such as graphene and organic molybdenum are added, which cannot be added because of their high price; Usually, only private car owners who pay attention to car maintenance in the tension equation will use this kind of products.