What is the calculation method for fuel consumption per 100 kilometers?
4 Answers
Calculation method for a car's fuel consumption per 100 kilometers: Fuel consumption per 100 kilometers equals fuel consumption (liters) divided by driving distance (kilometers) multiplied by 100. The fuel consumption per 100 kilometers indicated in the manuals 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 good road surfaces. The level of a car's fuel consumption is directly related to five major factors, namely driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that can increase a car's fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle in advance when encountering a red light, will increase fuel consumption. The car itself: Cars with larger displacement generally consume more fuel than those with smaller displacement because larger displacement usually means greater power, requiring more gasoline to burn and perform work. Cars with greater weight will have higher fuel consumption because greater weight requires more driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases the car's resistance and fuel consumption. Low environmental temperature: When the engine block temperature is low, the gasoline injected during a cold start is less likely to vaporize, requiring more gasoline to be injected for combustion, thus increasing fuel consumption. Additionally, at low temperatures, the engine's computer will control the engine to run at higher RPMs to warm up, which also increases fuel consumption.
The core method to calculate fuel consumption per 100 kilometers is to record the starting mileage before filling up the tank, drive a certain distance, then fill up again and note the ending mileage and the amount of fuel added. The formula is fuel consumption divided by distance traveled multiplied by 100. For example, if you drive 500 kilometers using 40 liters of fuel, the consumption per 100 kilometers would be 8 liters. I make it a habit to do this every month, keeping a logbook for easy comparison. I’ve noticed that driving steadily on highways saves a lot of fuel. In city traffic with frequent congestion, fuel consumption is higher, so it’s best to choose smooth routes for accurate measurements. Avoid sudden acceleration and braking, and check if tire pressure is adequate—these small habits can help reduce fuel consumption and be kinder to your wallet. Overall, consistent record-keeping helps you understand your vehicle’s performance and prevent potential issues.
As a car enthusiast, I think calculating fuel consumption per 100 kilometers accurately is crucial. First, reset the odometer, fill up the tank, drive about 100 kilometers, then refuel and record how many liters were added. Apply the formula (fuel added divided by distance multiplied by 100) to get the result. I often use the electronic dashboard for assistance, as it automatically displays with minimal error. There are many influencing factors: climbing hills or carrying a full load can cause fuel consumption to skyrocket, and turning on the air conditioning can also increase it by about 10%. I recommend regularly checking the air filter and engine oil condition, as these can increase fuel consumption when old. Through these details, you can better control your car, especially noticeable fuel savings when driving on highways.
Nowadays, most young people rely on mobile apps or in-car systems to directly view real-time fuel consumption data, eliminating manual calculations. The principle remains the same: fuel consumed divided by distance multiplied by 100, with the unit being liters. I once tried the fully manual method: reset the trip meter and fill up the tank before departure, then after driving for a while, divide the amount of fuel added by the kilometers driven to calculate the fuel consumption per 100 kilometers. Remember to refuel at the same gas station to minimize errors. Factors affecting fuel consumption include driving style: aggressive driving consumes more fuel than gentle driving; road conditions differ, with steady highway driving yielding better fuel efficiency than stop-and-go city traffic. Regular maintenance, such as scheduled servicing, can help keep fuel consumption low. It's simple and practical—once you measure it, you'll know how to adjust.
