Ask a master, is it harmful to use car carbon cleaning agent?

Carbon deposition will lead to lax valve closure, air leakage and knocking of intake valve or exhaust valve.

It won't cause much impact, and the disadvantages far outweigh the advantages. I suggest you clean it up.

The repair shop has a special cleaner. As for the brand, it still depends on the specific situation of your car.

(To what extent does the car have carbon deposits? ) specifically tell the on-site maintenance personnel so as not to affect the car.

Son, it's not too much to buy an expensive brand.