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What is the difference between S gear and M gear in a car?

2 Answers

DelElliott

07/24/25 4:20am

Here are the differences between the S gear and D gear in a car: 1. Driving state: "D gear" (driving) is the forward gear. When driving in this gear, the hydraulic system control device shifts up or down according to the preset program, and the entire process runs completely according to the set logic. You just need to step on the accelerator. "S gear" (sport) is the sport gear. When this gear is engaged, the hydraulic system can only connect to the first and second gears in the forward gears. 2. Fuel consumption: "S gear" consumes more fuel than "D gear" and should not be used frequently. When in S gear, the fuel injection volume is high at high speeds, which will inevitably increase the car's fuel consumption. Although it can accelerate instantly, this gear is mostly used when overtaking. This gear actually delays upshifting without changing other working conditions, which will bring greater load to the transmission and thus wear it out. 3. Using "S gear" is more powerful than "D gear" when going uphill. This is the same as the principle of manual gear downshifting to accelerate when going uphill. S gear limits the gear to first and second, making it more powerful when going uphill.

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LorenzoLynn

08/10/25 11:55pm

I've been driving for over a decade and am quite familiar with S mode and M mode. S stands for Sport mode - when shifted there, the engine revs higher and delays upshifting, giving much more aggressive acceleration which is great for overtaking, though fuel consumption increases too. M mode is Manual mode, letting me use +/- buttons to select gears manually. It's ideal for mountain ascents/descents - manually downshifting utilizes engine braking to reduce brake wear, unlike automatic transmissions that shift unpredictably. For daily driving I use D mode, switch to S on highways or when wanting some fun, and employ M mode in complex conditions like rain/snow to maintain control. The difference? Simply put: S mode is a smarter automatic acceleration, while M mode hands control to the driver for precise handling. Both are practical, but using them in appropriate situations makes all the difference.

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