What does instantaneous fuel consumption of 1.2L/h mean?

[RachelLee]

Instantaneous fuel consumption refers to the fuel consumption of a vehicle at a specific moment, reflecting the transient working condition of the car. When the vehicle is in motion, the unit displayed is "liters per 100 kilometers (L/100Km)", whereas when the engine is running but the vehicle is stationary, the displayed unit is "liters per hour (L/H)". More relevant information is as follows: Instantaneous fuel consumption value: A high instantaneous fuel consumption does not necessarily mean that the average fuel consumption will be high. Since modern fuel-injected engines can cut off fuel supply during coasting, some models may show an instantaneous fuel consumption as low as 0. Significance of instantaneous fuel consumption: By observing the instantaneous fuel consumption, car owners can understand the engine's fuel consumption under different conditions, such as when the vehicle is stationary and the engine is idling. Additionally, instantaneous fuel consumption can help understand the fuel consumption per 100 kilometers at different speeds (as the drag coefficient, which significantly affects fuel consumption, is proportional to the square of the speed), thereby helping to identify the vehicle's most economical speed.