What is the normal fuel consumption on highways?

[McRowan]

Normal highway fuel consumption ranges are determined by factors such as vehicle displacement and driving speed. Generally, for regular sedan models driving at 100 km/h on highways, the fuel consumption per 100 kilometers ranges between 6-10 liters. Fuel-saving methods on highways: Avoid frequent lane changes when driving on highways, as this causes uneven speed fluctuations and increases fuel consumption. Maintaining a steady speed is the most fuel-efficient driving method. At high speeds, wind resistance is significant, so it's not recommended to open windows while driving on highways, as this would increase fuel consumption. Choosing an appropriate speed on highways: An engine operates most fuel-efficiently under moderate to moderately high loads. Both near-minimum and near-maximum loads result in higher fuel consumption. Therefore, a moderate speed provides the engine with a relatively high output-to-resistance balance, keeping it within a relatively efficient operating range, while the resistance itself isn't too great to consume excessive energy. This balanced compromise represents the vehicle's economical speed. When driving on highways, one should adhere to the speed limits and not exceed them in pursuit of optimal fuel efficiency.