What are the disadvantages of using S gear on the highway?
2 Answers
The disadvantage of using S gear on the highway is that it increases the load on the transmission in a short period of time, accompanied by a rise in temperature, which in turn intensifies wear and tear. Below is an introduction to the S gear in cars: S gear is the sport mode: When the gear is switched to S position, the transmission can shift freely, but the shifting timing is delayed, keeping the engine at high RPM for a longer time. This allows the car to travel at low gear and high RPM for an extended period, resulting in greater torque output and acceleration. S gear fuel consumption: Generally, this gear is used only when overtaking or climbing a slope. After completing the action, it is switched back to the more economical D gear. After all, in terms of fuel consumption, since the fuel injection volume increases at high RPM, the fuel consumption in S gear mode is much higher than in normal mode. It also tends to wear out the transmission and is not necessary for daily driving.
I tried using S mode exclusively right after a long-distance drive and found the fuel consumption skyrocketed. S mode keeps the engine RPM consistently above 3000, with the fuel gauge visibly dropping – burning nearly half a tank more than usual over 300 km. The engine noise was particularly harsh, creating a persistent buzzing sensation that lingered. When I got out, the hood was scalding to the touch, suggesting prolonged use could accelerate engine wear. Most critically, throttle response became overly sensitive; even slight pedal pressure caused abrupt surges, increasing risks in heavy traffic. Recommended only for short-term mountain pass overtaking, not worth it for regular highway cruising.
