Does an Automatic Transmission Running Above 3000 RPM Damage the Car?

[VonManuel]

Automatic transmission running above 3000 RPM can significantly shorten the engine's lifespan. High RPM: While the engine can achieve complete combustion at high RPM, reducing carbon deposits, prolonged operation or gear shifts at 3500-4000 RPM subjects vehicle components (engine, transmission, tires, etc.) to excessive torque, leading to reduced longevity. Low RPM: Since engines frequently operate at low RPM, statistics show urban vehicles consume about 30% of fuel in low-RPM conditions. Thus, minimizing fuel consumption in low-RPM scenarios is crucial, which is also the objective of low-RPM control. Normal RPM: In practice, an automatic transmission engine RPM below 2000 is generally appropriate, as most vehicles automatically shift gears beyond 2000 RPM. In sport mode, the RPM may increase by over 500 due to gear mechanism influences, not manual adjustment. During cold starts, idle RPM typically ranges between 1200-1500. This is because the engine temperature is low at startup, requiring higher RPM to quickly raise the engine temperature. At normal operating temperature, idle RPM usually stabilizes at 800-900 RPM. In D gear without throttle input, the speed remains around 5-10 km/h.