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.

[StTessa]

To estimate the fuel consumption of a 450-horsepower engine idling for one hour, it depends on the specific engine type and condition. Typically, a 450-horsepower engine may have a displacement of around 5 liters, such as some high-performance V8 engines; at idle, the RPM is generally between 700 and 800, with fuel consumption roughly ranging from 1.2 to 2.5 liters per hour. Factors influencing this include whether the air conditioning is on (which can add an extra 0.3 liters of fuel consumption), ambient temperature (higher consumption in cold weather), and whether the engine is tuned for efficiency. Based on my experience, real-world data from many car owners shows an average of around 1.8 liters—it may not sound like much, but prolonged idling wastes fuel and increases engine wear. It's advisable to turn off the engine when parked or use smart start-stop features to save resources. Remember, idle fuel consumption is relatively small compared to driving, roughly only one-tenth of cruising fuel consumption, but it adds up over time, affecting both fuel economy and your wallet.

[AustinMarie]

My 450-horsepower SUV consumes approximately 1.6 liters of fuel when idling for an hour, which I believe is an observation from my personal driving experience. Once during heavy traffic, I idled for a full hour, and the fuel gauge showed a drop of nearly 1.5 liters. Generally, high-horsepower vehicles like this have an idling fuel consumption ranging between 1.2 to 2 liters per hour; this depends on the engine size—for instance, larger displacement gasoline engines tend to be thirstier. I usually try to minimize idling because it not only costs money—calculating to over 10 yuan per hour—but also accelerates carbon buildup in the engine. If you're an owner, pay attention to turning off the engine when parked or schedule regular maintenance to reduce issues. These small details can save significant expenses, especially when fuel prices are high.

[EvanRose]

For a 450-horsepower vehicle idling for one hour, I estimate the fuel consumption to be approximately 1.4 to 2.0 liters. This equates to emitting about 3 kilograms of CO₂, impacting air quality. Idling is unnecessary fuel waste, and many cities have already advocated for no-idling measures. From an environmental perspective, I would say each hour of idling consumes additional resources, and I recommend switching to hybrid technology or electric mode. Calculations show this consumption standard for medium-displacement engines; simple habits like timely engine shutdown can improve the situation.