What is the most effective way to clean engine carbon deposits?

[SanBrynlee]

This professional cleaning is usually carried out at 4S shops or auto repair shops, commonly referred to as "intravenous drip cleaning," which does not require disassembling the engine. This method should be the simplest, most convenient, and time-saving one. It is straightforward—just add the additive directly to the fuel tank. This method is currently considered the cleanest and most thorough way to clean carbon deposits. Driving at high speeds causes the engine temperature to rise higher than during normal driving, and the high temperature can help burn off the carbon deposits.