What are the methods to clean carbon deposits in BMW cars?

[OGavin]

BMW cars can clean carbon deposits through methods such as using an IV drip, cleaning the intake manifold, or frequently driving long distances or on highways. IV Drip: Cut off the fuel supply, connect the carbon deposit cleaner to the engine injector, and use the cleaner to soften the carbon deposits inside the engine, which are then burned and emitted. However, this method is only suitable for minor carbon deposits. Cleaning the Intake Manifold: Remove the engine intake manifold, scrape off the stubborn carbon deposits, clean them, and then reinstall the manifold. This method yields the best and most noticeable results. Frequently Driving Long Distances or on Highways: When the vehicle is in a hot state, it hardly produces any carbon deposit adhesion. Additionally, the high-speed operation of the engine can expel some carbon deposits. This is why cars that frequently drive on highways are more fuel-efficient and easier to drive.