How much fuel is consumed when the car is idling?

[Eva]

Generally, the fuel consumption during idling is about one-third of that during normal driving. Normal idling: When the vehicle is parked and the engine is started, the minimum stable operating speed of the engine is called parking idling (the process of the engine transitioning from a cold idle state to an idle state where it reaches normal operating temperature is called warming up or heating the car). Driving idling: During gear shifting, if the accelerator pedal is not pressed or is released while driving, maintaining the minimum throttle opening, the state where the engine speed matches the parking idle speed is referred to as driving idling.

[AlanaRose]

I've driven quite a few cars before and noticed that idling consumes a significant amount of fuel. Generally speaking, for small cars with a 1.5L engine displacement, idling for about an hour consumes approximately 0.5 to 0.7 liters of fuel, which translates to roughly over ten yuan in fuel costs. Larger vehicles or SUVs are even more fuel-hungry, consuming over 1 liter. There are several influencing factors: using air conditioning in summer or heating in winter can double fuel consumption; older engines with lower efficiency consume more fuel; electronic systems like start-stop functions can actually save some fuel, but don't keep them on all the time. It's advisable to minimize idling time, such as turning off the engine if a red light lasts longer than 30 seconds, which can save a considerable amount of fuel in the long run. Regular engine maintenance checks can also optimize fuel efficiency—for example, cleaning carbon deposits helped my old car burn a bit less fuel.

[SanDallas]

As an environmentally conscious person, it pains me to see cars idling and wasting fuel. Idling not only consumes fuel—ranging from 0.4 to 1 liter per hour—but also increases carbon emissions, equivalent to the pollution of a short trip. This is more common in urban traffic jams, where a car's cumulative idling fuel consumption can exceed 100 liters per year. I recommend developing good habits: turn off the engine during brief waits, avoid unnecessary warm-ups (especially in winter, don’t exceed 5 minutes), and switch to public transport or carpooling to reduce overall fuel consumption. This not only saves money but also protects the environment, ensuring cleaner air for future generations. In the long run, fuel-efficient driving can extend engine life and reduce repair frequency.

[DelilahFitz]

When I first got my driver's license, I was curious about this issue. After researching, I found that idling does consume a noticeable amount of fuel. For an average family car, idling without moving burns about half a liter of fuel per hour, which translates to roughly six or seven yuan. Factors like using air conditioning or other onboard devices can add to the consumption, so it's better to minimize AC use while waiting at traffic lights on hot days. I once tried recording with a mobile app and noticed that every 10 minutes of idling in traffic jams cost an extra one or two yuan. A simple suggestion: if you're waiting for more than a minute, it's better to turn off the engine to save fuel. Occasional idling is fine, but making it a habit can save money and prevent battery aging.

[ORyder]

As someone with some mechanical knowledge, I always pay attention to engine efficiency. At idle, the engine maintains the minimum speed for fuel supply, and fuel consumption depends on displacement: a 1.6L car consumes about 0.6 liters/hour, while a 2.0L car may consume 0.8 liters. Air conditioning or electrical loads can increase fuel consumption by 20% to 30%; the electronic injection system controls precisely, but fuel consumption increases when it ages. I recommend regular checks of spark plugs and air filters to optimize combustion and reduce waste. Long-term idling also causes carbon buildup, shortening the lifespan of parts. It's better to install an automatic start-stop system to control idling time, which has helped my car save a lot of fuel.

[DeSpencer]

As a daily commuter, I find the fuel consumption during idle traffic the most annoying. An ordinary car idling for an hour without moving wastes about 0.5 liters of fuel, equivalent to over ten yuan. Factors affecting this include higher temperatures doubling fuel consumption when the AC is on, and older cars (over five years) consuming slightly more. I've developed the habit of turning off the engine at red lights lasting over 30 seconds or tracking fuel usage via apps to save money. In the long run, accumulated idling can burn dozens of liters of fuel annually. It's better to reduce unnecessary idling, like avoiding preheating the car for over three minutes in winter, which saves money and is more environmentally friendly.