How many minutes and at what RPM should you drive at high speed to clean carbon deposits?

[OReese]

Keeping the engine running above 3500 RPM for more than 15 minutes can remove carbon deposits, such as driving at 110 km/h in 3rd gear or around 140 km/h in 4th gear. Here is the relevant information: 1. Carbon deposits: Carbon deposits in the engine are a coking-like substance produced by unsaturated olefins and gums in the fuel under high temperatures during engine operation. 2. Cleaning carbon deposits: The so-called high-speed driving to clean carbon deposits is based on the theory of keeping the engine running at high RPM, maintaining high intake and exhaust pressures and cylinder working temperatures, to wash away carbon deposits that have not yet fully adhered to the cylinder wall surface, which then participate in combustion and are expelled as exhaust gases.