Should I Use D or S Gear on the Highway?
2 Answers
When driving on the highway, using D gear is sufficient. The S gear can be used during aggressive driving or overtaking. Most automatic transmissions have an S gear, which stands for Sport mode. After switching to S gear, the transmission enters Sport mode, and the engine's operating mode will also change accordingly. In S gear, the transmission delays shifting, only upshifting when the engine reaches the redline. Continuously using S gear on the highway will increase fuel consumption and engine wear. During high-speed cruising, such strong power and rapid response are unnecessary. Some automatic transmissions also have an M gear, which is the manual mode of the transmission. After switching to M gear, the driver can control gear shifts using paddle shifters behind the steering wheel or the gear lever. M gear is also very suitable for overtaking or aggressive driving.
I've been driving for many years and usually use the D gear when driving on the highway, finding it very convenient. The transmission automatically adjusts in D gear, maintaining low RPM cruising, which is both fuel-efficient and quiet and comfortable, unlike the S gear that makes the engine roar and fuel consumption soar, feeling too intense. When driving long distances, maintaining a steady speed in D gear is the best choice. However, when encountering uphill climbs or overtaking, briefly switching to S gear can provide stronger acceleration and faster response. But remember, at high speeds on the highway, safety comes first, and prolonged use of S gear may lead to faster wear. It's recommended to use D gear more often to save on fuel costs, extend engine life, and simplify maintenance. In short, D gear is my first choice, and I only opt for S gear occasionally for an extra boost.
