How much fuel does a vehicle consume per hour at idle?

[DelLeah]

Vehicle idle fuel consumption is approximately 1-2 liters per hour. Here are the specific details about car idling: 1. The idle condition of a car is designed to overcome internal engine resistance. When the vehicle remains stationary while the engine is still running, it enters idle mode. 2. During this state, the engine operates at lower RPM with reduced air intake, requiring a richer air-fuel mixture to maintain operation. 3. Based on current average vehicle displacements of 1.5-1.8 liters, hourly idle fuel consumption ranges between 1-2 liters. 4. Additionally, if air conditioning is used during summer, idle fuel consumption will increase further. 5. Typical gasoline vehicles idle at around 800 RPM, while diesel vehicles idle at approximately 500 RPM. Vehicles with larger displacements consume more fuel per hour at idle. 6. Therefore, when waiting for extended periods, it's advisable to turn off the engine rather than maintaining prolonged idling. Extended idling not only increases fuel consumption but also leads to incomplete combustion and carbon buildup.