Does the Engine Auto Start-Stop Function Save Fuel?

[CollinDella]

The engine auto start-stop function saves fuel, and its usage method is: 1. When encountering traffic lights or other reasons for stopping while driving, the engine automatically shuts off after braking; 2. When starting again, simply release the brake and press the accelerator or gently turn the steering wheel, and the engine will restart. The engine auto start-stop function button is AOFF, and its working principle is: 1. When braking to stop and shifting to neutral, the system automatically detects that the engine is idling and not in gear, the speed sensor shows zero, the battery sensor shows energy, and the engine automatically stops rotating; 2. When pressing the clutch, releasing the brake, or turning the steering wheel, the system quickly starts the engine.

[VanCarson]

To be honest, I've driven cars with auto start-stop function for years. In congested cities, it really saves fuel. Every time you stop at a red light, the engine shuts off, saving 10-15% fuel. Calculated over a year, it can save hundreds of dollars in fuel costs. But the premise is that the stop time exceeds 20 seconds - short stops aren't cost-effective as the restart consumes more fuel and increases wear on the battery and starter. I rarely use it on highways since there aren't frequent stops. It's also less effective in cold weather because cold engine starts are inefficient. Overall, it's effective for saving money during urban commuting, but you need to adjust settings based on traffic conditions - don't dismiss it outright.

[MacAlex]

As someone who usually cares about environmental protection, I think the auto start-stop feature of the engine is indeed meaningful in terms of fuel saving, and reducing emissions is even more crucial. When I wait at a red light and the engine stops, it avoids wasting fuel and reduces environmental pollution. According to statistics, in urban scenarios with frequent stops and starts, it can save 8-12% of fuel consumption, which is equivalent to spending less on fuel and reducing carbon footprint. However, it is not suitable for all environments, such as having little effect on highways. I suggest everyone use it reasonably, turning it on during traffic jams, which not only protects the earth but also lightens the wallet. It's truly a win-win green technology.

[AlexanderLynn]

From a technical perspective, the auto start-stop function is designed to shut off the engine when the vehicle is stationary to save fuel, avoiding idling consumption. Although restarting causes a momentary spike in fuel usage, stopping for slightly longer periods (e.g., over 30 seconds) can offset this loss. Actual fuel savings depend on the frequency and duration of stops, with noticeable effects in congested urban areas—potentially reducing fuel consumption by 7-10%. However, if stops are frequent and brief or during cold starts, it may not be cost-effective. I'd say it's a useful feature, but it may place additional strain on vehicle components like the battery, requiring attention during maintenance.

[SawyerMarie]

I drive in the city every day for my commute, and the auto start-stop feature does help me save some money on gas. At red lights in congested areas, when the car is stationary, the engine shuts off, avoiding fuel waste and saving me dozens of dollars each month. However, at some intersections with short lights, the constant restarting can be annoying and slightly increases fuel consumption. Overall, this feature is suitable for regular commuters, reducing idle fuel consumption by about 15%. Of course, if the traffic is smooth, using it doesn’t make much sense. I recommend enabling it in urban areas with frequent traffic jams but adjusting the vehicle settings to balance convenience and fuel efficiency.