When is the best time to use S mode?
2 Answers
S mode is best used when overtaking or climbing hills, and you can switch back to the more economical D mode after completing the action. In terms of fuel consumption, the higher engine speed increases fuel injection, leading to higher fuel consumption in S mode compared to normal mode, which can also cause more wear on the transmission. It is not necessary for daily driving. For cars frequently driven in congested urban areas, where carbon deposits tend to accumulate in the engine, periodic use of S mode can help remove these deposits, improve fuel economy, and extend engine life. However, it is not recommended to use S mode for extended periods on highways, as it only delays gear shifts without altering other operational parameters. This can significantly increase the transmission load in a short time, raise temperatures, and accelerate wear. Additionally, vehicle comfort may be slightly reduced in S mode, so prolonged use should be avoided.
I've been driving for ten years, and when I need to overtake quickly, I highly recommend using the S mode. For example, on national highways when a large truck is blocking the way, switching to S mode instantly raises the RPM, providing much faster power response. You can easily overtake without pressing the accelerator too hard. However, don't get greedy—switch back to D mode after overtaking. This mode consumes 20-30% more fuel than D mode, puts extra strain on the engine over time, and can affect transmission longevity. A friend of mine once used S mode continuously for about a hundred kilometers on the highway, and later the transmission fluid temperature soared, triggering a warning. In my opinion, it's best used for short-term scenarios like overtaking, climbing steep hills, or accelerating off ramps—safe and efficient.
