How much fuel does a 420-horsepower engine consume per hour at idle?

[RyderLynn]

420-horsepower engine at idle for one hour consumes approximately 2 liters of fuel per hour. In addition to fuel consumption, idling can also cause carbon buildup in the engine, which over time can affect engine performance. Therefore, unless necessary, try to avoid idling. Carbon buildup can even lead to piston ring failure: Due to prolonged idling, the engine temperature remains too low, leading to incomplete fuel combustion, which can easily cause carbon buildup, clog fuel injectors, and severe carbon buildup can cause piston rings to seize or even break. Increased engine wear: Prolonged idling results in poor fuel atomization. Unburned atomized diesel can wash down the cylinder walls and enter the lubricating oil, diluting and degrading the oil. This leads to insufficient lubrication for engine components, accelerating engine wear. Air quality impact: Engines running at idle for extended periods have poor combustion, leading to worsened exhaust emissions. If toxic gases enter the cabin, they can pose life-threatening risks to occupants resting inside. Fuel wastage: Low idle speed reduces the oil pump speed, leading to low oil pressure and insufficient oil flow to lubrication points.