How many liters of fuel does a diesel car consume in one hour of idling?

[StAniyah]

Diesel cars consume approximately 2 liters of fuel in one hour of idling. The function of car idling: Idling is a working condition of a car, referring to the engine running in neutral gear. The engine speed during idling is called the idle speed. The idle speed can be adjusted by changing the throttle opening size. Idling means the engine is "producing power without doing work." When the engine is running, if the accelerator pedal is completely released, the engine is in an idling state. Reasons for unstable idling: Direct causes refer to mechanical parts being dirty, worn, or improperly installed, leading to changes in the power output of individual cylinders, resulting in an imbalance of power among the cylinders and causing unstable engine idling. Indirect causes refer to abnormalities in the engine's electronic control system, leading to poor combustion of the air-fuel mixture, making it difficult to balance the power among the cylinders and causing unstable engine idling.

[MacMalia]

I remember when I drove a diesel car, I often idled while waiting for people, consuming about 1 to 2 liters of fuel per hour, mainly depending on the engine displacement. For my old 1.6L diesel sedan, idling for an hour used around 1.3 liters, with the fuel gauge dropping slightly. Larger-displacement SUVs might consume 2 liters or more, and temperature also affects it: cold starts use a bit more fuel. To be honest, frequent idling like this not only wastes money on fuel but also harms the engine, as excessive carbon buildup can lead to issues. I recommend avoiding long waits in parking lots and turning off the engine—it’s safer and more economical.

[MacLeila]

Years of driving experience have taught me that diesel vehicles typically consume 1 to 3 liters of fuel per hour at idle, depending on the model. Smaller vehicles like pickup trucks use 0.8-1.5 liters, while large trucks consume 2-4 liters. Having driven diesel trucks myself, I can confirm that idling for an hour easily burns 2.5 liters. This is because the low idle speed results in poor combustion efficiency - while it consumes less fuel than driving, it's still wasteful. Additionally, frequent idling may affect vehicle lifespan by causing carbon buildup. To avoid waste, it's best to pull over and turn off the engine, or just let it warm up for a few minutes when starting.

[McAriel]

As a car enthusiast, the fuel consumption of diesel vehicles at idle for one hour is quite interesting, with an average range of 1 to 2.5 liters being common. Depending on the displacement: a 1.5L compact car might use 1 liter, while a 3.0L larger vehicle could approach 3 liters. A friend of mine who drives a diesel SUV tested it and used 1.8 liters of fuel in an hour. However, it's important to note that prolonged idling can lead to engine carbon buildup. I recommend avoiding this habit or installing an idle timer to control the duration and prevent long-term damage.