Does Engine Auto Start-Stop Have a Significant Impact on the Engine?
3 Answers
Although the engine auto start-stop feature causes the engine to start and stop frequently, the damage to the engine itself is minimal. With regular maintenance, the wear and tear from repeated starts and stops on the engine are negligible. Below is some relevant information about auto start-stop: 1. Function of the auto start-stop system: During traffic congestion or while waiting at traffic lights, the engine can shut off, saving fuel that would otherwise be consumed during idle. When it's time to drive, the engine starts immediately. 2. More than 80% of engine wear occurs during cold starts, while normal idle operation accounts for about 20% of wear. The auto start-stop system operates under hot start conditions, temporarily shutting off the engine only during brief stops.
The auto start-stop system essentially shuts off the engine at red lights or in traffic jams and then quickly restarts it. This design doesn't significantly impact the engine but does impose additional burdens. For example, frequent restarts increase wear on the starter and battery, as each start involves an electrical surge—older models may see a shortened starter lifespan. However, modern cars have optimized this with reinforced starter components and AGM batteries to cushion the impact. I've also noticed that the lubrication system has a protective mechanism during restarts; the oil film doesn't disappear immediately, reducing engine wear risks. Overall, the direct impact on the engine is manageable, but it's advisable to occasionally deactivate the system in heavy urban stop-and-go traffic to extend component life. Remember, regular checks on the battery and starting condition can prevent unexpected failures.
After driving for a long time, I have some minor complaints about the start-stop system. Every time the engine restarts, there's a slight vibration and noise. Although it doesn't affect driving safety, it occasionally disrupts comfort, especially during traffic jams when the frequent starts and stops become annoying. However, it does help save some fuel costs and reduces emissions in the long run. The engine's core components, such as pistons and crankshafts, have strong wear resistance, and the designers have considered these repeated start-stop scenarios, using thermal management systems to prevent overcooling. I recommend that beginners get used to the auto start-stop feature and not manually turn it off frequently; the system will pause when the air conditioning is on in summer to avoid affecting cooling. Don’t neglect regular maintenance—changing the oil on time can reduce potential wear.
