How much fuel does a 450-horsepower engine consume at idle for one hour?

[LandonRose]

Generally, a household car consumes around 2 liters, but the specific amount depends on the engine displacement and idle speed. The larger the displacement, the higher the fuel consumption at idle. For a 1.6-liter engine at around 800 RPM, the consumption is approximately 0.8L per hour. Idle speed generally refers to the engine running without doing any work—the car remains stationary, but the engine continues to burn fuel. Below is additional information: Consequences of carbon buildup: Carbon buildup can cause incomplete combustion of gasoline, leading to engine shaking. Engine carbon buildup has a significant impact on the car. First, it reduces engine power, meaning uneven and gradually diminishing power output—in other words, the engine becomes weaker over time. Second, it increases fuel consumption, adding to the financial burden.