How to Know the Fuel Consumption per 100 Kilometers of a Car?
3 Answers
Methods for calculating a car's fuel consumption per 100 kilometers: The fuel consumption per 100 kilometers equals the fuel consumption (liters) divided by the driving distance (kilometers) multiplied by 100. The fuel consumption per 100 kilometers indicated in the manual of domestic cars is generally the constant-speed fuel consumption. Constant-speed fuel consumption refers to the fuel economy indicator when the car is driving at a constant speed on a good road. Several key technologies related to fuel consumption include three main aspects: 1. Vehicle weight: The relationship between vehicle weight and fuel consumption is directly proportional. For every 10% reduction in vehicle weight, fuel consumption will decrease by several percentage points accordingly. 2. Car design: Car design, with lower aerodynamic drag, will significantly reduce fuel consumption. The relationship between these two is also directly proportional. 3. Road conditions: Driving conditions are an important factor affecting fuel consumption.
I usually test my car's fuel consumption myself. The simplest method is to note the odometer reading each time I fill up the tank, then drive normally for a few hundred kilometers before filling up again, recording the amount of fuel added and the kilometers driven during that period. Dividing the fuel amount by the kilometers driven and then multiplying by 100 gives the fuel consumption per 100 kilometers. This method is practical, and I use a mobile app or paper notes to record the data for long-term tracking. At the same time, fuel consumption is affected by various factors, such as aggressive acceleration consuming more fuel, while steady highway driving saves fuel. Hot weather with air conditioning on or increased vehicle load also raises fuel consumption. Regularly checking tire pressure and maintaining the vehicle helps maintain ideal fuel consumption levels. Through this method, I can not only know the actual fuel consumption but also adjust my driving habits to save costs.
I like to refer to multiple sources to understand fuel consumption. First, I check the vehicle's user manual or the official fuel consumption label on the windshield, which provide standardized test data. However, I've noticed significant differences in real-world driving. Therefore, I use the car's dashboard display function—many vehicles have an average fuel consumption option or allow data reading directly via the OBD interface with diagnostic tools. This is more accurate than manual calculations, but it's important to account for error factors like traffic congestion or varying driving styles. I also combine insights from online platforms, such as fuel consumption apps with user feedback, to compare the fuel efficiency ranges of different models. Regular maintenance is crucial; engine carbon buildup or a dirty air filter can increase fuel consumption, so keeping the vehicle in good condition helps optimize the data.
