Does Auto Start-Stop Harm the Engine?
4 Answers
Auto start-stop does not harm the engine. The advantages of auto start-stop are: 1. The engine can automatically shut off, reducing fuel consumption and emissions; 2. After the engine shuts off, the power supply can replace the belt pulley to provide operating power for the engine cooling fan and in-car air conditioning. Precautions for auto start-stop include: 1. Quickly shift to P gear and release the brake when the engine shuts off; 2. Reduce current consumption; 3. Do not repeatedly press the brake when the engine is off; 4. Let the engine speed drop to zero, engage the starter gear, and then restart; 5. Do not enable the auto start-stop system during low-speed parking or when using the air conditioning.
As an enthusiast who loves researching automotive technologies, I often discuss the auto start-stop system. It automatically shuts off the engine at red lights to reduce fuel consumption, and its design has taken wear and tear into consideration. For example, the starter is reinforced into a more durable version, and the battery is upgraded to a stronger AGM type to prevent engine damage from frequent starts. Manufacturers have tested that engine components can withstand more start cycles without significantly shortening their lifespan. On the contrary, it saves 10%-15% of fuel consumption and reduces exhaust emissions. Just ensure the system is well-maintained during use and avoid activating it under extreme temperatures. There may be minor issues, but overall, the advantages outweigh the disadvantages.
I've been driving for over thirty years and have used many cars with auto start-stop systems. Initially, I was a bit worried about whether frequent starts would damage the engine. But experience has taught me that modern car designs are very smart, with reinforced starters and bearings that offer high durability. The fuel savings in traffic jams are quite cost-effective, adding up to significant savings over a year. There might be some extra wear on the engine, but it's nothing to worry about—just keep up with regular maintenance checks. If you take good care of your car, this system offers more benefits than drawbacks, so you can use it with peace of mind.
From a repair perspective, having worked on so many vehicles with auto start-stop systems, the damage is minimal. The engine's critical components are reinforced during design, and the smooth starts have little impact on wear. Occasionally, starter or battery issues are seen, but these are usually in older vehicles or due to poor maintenance. With normal use, the start-stop system is highly reliable, and lifespan tests show it doesn't shorten the engine's overall service life. Keeping the battery in good condition and using higher-quality lubricants can easily prevent these minor issues.
