What is the difference between average fuel consumption and post-refuel average fuel consumption?

[FinnAnn]

The "100 km average fuel consumption" after refueling represents the average fuel consumption per 100 km for the current tank of fuel, which starts a new calculation. It is essentially the same as the 100 km average fuel consumption without refueling, but differs in the weighting factor used for time-segmented calculations (e.g., calculated every 10 seconds). "Average fuel consumption" refers to the average fuel consumption over a certain period at the current speed (e.g., the average fuel consumption over 2 seconds of driving), which does not use a weighted average. Average fuel consumption is what is commonly referred to as fuel economy, defined as the amount of fuel used per unit distance traveled by the vehicle. The commonly used unit is liters per 100 kilometers (l/100km), i.e., fuel consumption per 100 km. Whether a car is fuel-efficient depends on its fuel consumption, which reflects the vehicle's fuel economy. The level of a car's fuel consumption is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and ambient temperature. Specific factors that can increase fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle before a red light, can increase fuel consumption. The car itself: Cars with larger engine displacements generally consume more fuel than those with smaller displacements because larger displacements usually mean greater power, requiring more gasoline to burn and perform work. Heavier cars also 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 ambient temperatures: When the engine block is cold, the gasoline injected during a cold start does not atomize easily, requiring more gasoline to be injected for combustion, which increases 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.