Does Sport Mode Cause More Carbon Buildup?

[LaGarrett]

Sport mode is prone to carbon buildup. When using the S gear, fuel injection increases, making the air-fuel mixture richer, which can lead to incomplete combustion. This not only wastes fuel but also makes carbon deposits more likely. Additionally, prolonged idling can also contribute to carbon buildup. Sport mode is also called S gear. The sport mode ("S" stands for "sport") is equipped in many automatic transmission vehicles, and some high-end A-segment car models also feature S gear design. In S gear sport mode, the transmission can shift freely, but the shift timing is delayed, keeping the engine at high RPMs for a longer period. This allows the car to operate at low gears with high RPMs for extended durations, resulting in greater torque output and acceleration. While driving, simply push the gear lever into the "S" position, which is typically used for climbing hills or quick overtaking. Since S gear only delays upshifting without altering other operational aspects, it inevitably increases the transmission load in the short term, accompanied by rising temperatures, leading to accelerated wear. Therefore, it is advisable to avoid prolonged use of S gear.