How to Calculate Car Fuel Consumption?
2 Answers
Introduction to car fuel consumption calculation methods is as follows: 1. Analysis based on engine fuel power stroke: The most direct factor affecting fuel consumption is engine speed. For each revolution of the engine, one cylinder injects fuel (in a four-cylinder engine), meaning higher speed leads to greater fuel consumption. However, engine speed varies during driving, making it too volatile and complex for calculating vehicle fuel consumption. 2. Vehicle travel distance: Expressed as fuel consumption per 100 kilometers, this is currently the mainstream method for calculating car fuel consumption. Various vehicle parameter indicators use this metric to evaluate whether a car is fuel-efficient. Both methods mentioned above cannot or are inconvenient for comprehensively reflecting a vehicle's fuel consumption index, especially the second mainstream calculation method, which fails to account for fuel consumption when the vehicle is stationary. Therefore, using a time-based indicator to measure a vehicle's comprehensive fuel consumption index is more reasonable.
I usually calculate fuel consumption while driving mainly to save money. Every time I fill up the tank, I record the odometer reading in my phone's memo, then drive normally. When I next fill up the tank, I record the new reading and the amount of fuel added (e.g., 30 liters). The distance traveled equals the new reading minus the old reading, for example, 400 kilometers. The fuel consumption formula is simple: fuel added divided by distance traveled multiplied by 100 gives the fuel consumption per 100 kilometers, e.g., 30/400*100=7.5 liters per 100 kilometers. I often use an app to automatically calculate the average to avoid manual errors, which helps monitor fuel-efficient driving habits and control costs. Different road conditions have a big impact: fuel consumption is lower on highways, but it spikes in city traffic jams, so I avoid driving in busy areas on weekends. After keeping records for half a year, I managed to reduce fuel consumption, saving hundreds of yuan per month on fuel—definitely worth sticking to.
