How much diesel does a 430-horsepower engine consume at idle for one hour?

[McGabriel]

430-horsepower engine consumes approximately 1.5 to 2 liters of diesel per hour at idle. Here are the relevant details: 1. Idle speed is related to engine displacement: Generally, gasoline engines idle at around 800 RPM, while diesel engines idle at about 500 RPM. The higher the engine displacement, the more fuel is consumed per hour at idle. Therefore, when waiting for a long time, it's better to turn off the engine rather than let it idle for extended periods. 2. Hazards of idling: Prolonged idling not only increases fuel consumption but also leads to incomplete combustion of fuel, resulting in carbon deposits. 3. Auto start-stop function: For car owners who are concerned about fuel consumption, they can choose vehicles equipped with an auto start-stop function when purchasing a car. Nowadays, many vehicles come with this feature.

[VonCassidy]

As someone who has driven large vehicles for many years, I know that a 430-horsepower diesel engine idling for an hour can burn about 3.5 liters of diesel. At the current fuel price of, say, 7 yuan per liter, that's 25 yuan wasted, which is quite painful. Idling not only consumes fuel but also causes carbon buildup, speeding up engine aging. I always advise my friends to minimize idling—for example, turning off the engine if waiting just a few minutes in a parking lot. Developing this habit can save a lot of money. In summer, idling with the AC on consumes even more fuel, so it’s better to park in the shade or start the engine only briefly. In the long run, this practice protects your vehicle and keeps your wallet from thinning.

[StAlaina]

From an environmental perspective, idling a 430-horsepower engine for one hour consumes 3 liters of diesel and emits a significant amount of exhaust. I've calculated that this is equivalent to the carbon dioxide and particulate emissions from driving several kilometers, which exacerbates air pollution. Unnecessary idling in modern society is such a waste of resources. I always advocate for turning off the engine when it's safe to do so, such as during short stops or at red lights. This practice can help reduce our carbon footprint and keep our immediate environment cleaner.

[MaggieRose]

Technically, idle power is very low, and fuel consumption depends on displacement. A 430-horsepower diesel engine with about 6 liters of displacement consumes approximately 0.6 to 1.2 liters per hour at idle, averaging around 3 liters. My estimation is based on low engine load, but it varies across different vehicle models.