What does the S gear mean in an automatic transmission car?

[MatteoAnn]

Automatic transmission car's S gear stands for Sport mode. When engaged in this gear, the engine can provide more powerful performance. Generally, when overtaking, shifting into S gear can be more fuel-efficient. Moreover, stepping hard on the accelerator in S gear saves a lot of fuel and accelerates much faster. Advantages and disadvantages of using S gear: 1. Advantages: For cars frequently driven in congested urban areas, the engine tends to accumulate more carbon deposits. Therefore, using S gear periodically helps remove carbon deposits from the engine, improves fuel economy, and extends engine life. 2. Disadvantages: 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, which leads to accelerated wear. Hence, it is advisable not to use S gear for extended periods. In terms of fuel consumption, because the fuel injection volume increases at high RPMs, the fuel consumption in S mode is significantly higher than in normal mode.

[StKatherine]

After driving an automatic transmission car on long trips for seven or eight years, I found the S gear particularly practical. It stands for Sport mode, and once engaged, the car immediately changes its character. The engine revs will rise by a few hundred RPM before shifting, and the transmission becomes more responsive, making acceleration much sharper with each press of the throttle. I like using it when overtaking on highways or taking turns on mountain roads, while sticking to D gear for regular city driving. Just be careful not to keep it in S gear all the time—higher RPMs mean higher fuel consumption, and the car will sound louder. By the way, some cars can use engine braking when descending steep slopes in S gear to prevent brake overheating, which is a thoughtful design.

[DaisyAnn]

As a car enthusiast, I consider the S mode as the transmission's sport mode. Engineers designed this gear to make throttle response more aggressive and delay shift timing for sustained power output. Simply put, it keeps the engine working in its optimal power band, with shifts above 4,000 RPM being common. Compared to the docile nature of regular D mode, S mode is perfect for situations requiring instant burst power, like merging onto highways or overtaking on mountain roads. Once when driving a friend's coupe in the suburbs with S mode engaged and flooring the accelerator, the exhilarating acceleration and engine roar were downright addictive - though prolonged use typically increases fuel consumption by about 2 liters.

[VonRichard]

As a beginner, I couldn't understand the S button, but now I've figured it out. It's simply the Sport mode, and its principle is straightforward: the computer controls the transmission to delay the shift points. A car that normally shifts at 2000 rpm might wait until 3000 rpm to upshift in S mode. It's mainly used for climbing steep slopes to prevent rolling back or when sudden acceleration is needed on highways. Note that using lower gears in rainy weather can reduce slipping, and it also helps protect brake pads during long descents. Remember to switch back to D mode after use, otherwise, it'll just waste fuel.