At what speed does a car achieve the best fuel efficiency?

[VonElle]

Most gasoline-powered vehicles achieve optimal fuel efficiency at speeds between 60-90 km/h, while a few perform best between 90-110 km/h. This depends on factors such as the vehicle's drag coefficient, engine technology level, transmission matching, etc. Methods to save fuel are as follows: 1. Control speed: The economical speed is when the car operates in direct drive or overdrive, resulting in the lowest fuel consumption. Driving at different speeds on the same road leads to varying fuel consumption. Only at a specific speed does the car achieve the lowest fuel consumption. Therefore, driving at medium speed in automatic or high gear can save fuel. 2. Select the appropriate gear: Gear selection and shifting actions significantly impact fuel consumption. When starting, choose the gear reasonably based on load and road conditions. If you feel insufficient power while driving, downshift promptly instead of solely pressing the accelerator, which would increase fuel consumption. During gear shifting, be quick and precise with your movements. This shortens the distance traveled during shifting, achieving the goal of saving fuel.