At what speed is the most fuel-efficient?
2 Answers
The most fuel-efficient speed for sedans is between 60km/h and 90km/h. Cars are most fuel-efficient when traveling at their economic speed. Generally, on highways, exceeding the economic speed leads to increased fuel consumption as speed increases. Methods to save fuel: Minimize the use of brakes. Driving in a 'start-stop' manner is particularly fuel-consuming. When approaching intersections or downhill sections, you can release the accelerator in advance to allow the car to decelerate naturally and stop, which is more fuel-efficient. Reduce the car's load. It is advisable to remove unnecessary items from the car. If the load is reduced, fuel consumption will naturally decrease slightly. Ensure normal tire pressure. If the tires are abnormal, it can also increase fuel consumption. Therefore, if any tire abnormalities are detected, they should be checked promptly. This not only saves fuel but, most importantly, ensures driving safety. Control the optimal engine speed. While driving, the engine speed of most fuel-injected cars is most efficient between 2200 and 2500 rpm. Regardless of the gear, maintain the engine speed around 2200-2500 rpm. Too low a speed makes the car sluggish, consumes fuel without moving, and damages the engine, while too high a speed increases unnecessary fuel consumption and also harms the engine.
I've been driving for over 30 years and found that the most fuel-efficient speed is usually between 60 to 70 kilometers per hour, depending on whether your car is a compact or SUV – less wind resistance means better fuel economy. Driving too fast in the city consumes more fuel, and on the highway, exceeding 100 km/h results in significant wind resistance that burns through gas. I've driven both older sedans and modern hybrids, and the difference isn't huge – maintaining a steady speed is key, avoiding frequent acceleration or braking. Last month on a long trip, I consistently cruised at 65 km/h and got an extra 50 kilometers out of a full tank compared to usual. The engine feels most comfortable around 2000 RPM, where fuel consumption is low. Try keeping your right foot steady – you'll enjoy the drive and save money too.
