What are the hazards of low gear and high RPM?
2 Answers
The hazards of low gear and high RPM: 1. Wastes gasoline; 2. Fails to fully utilize the kinetic energy of the car, causing the engine to run at high speed while the gearbox operates in low gear. Suddenly shifting a high-speed car into low gear will make the car's operation drive the engine, resulting in changes in sound, which is not advisable during operation; 3. Long-term low gear and high RPM can cause a large amount of carbon deposits. The hazards of high gear and low RPM: 1. Driving in high gear and low RPM makes it difficult to utilize the engine's full power and may even damage the vehicle's power system; 2. When the engine operates in high gear and low RPM, the engine output is weak with low torque; 3. Low RPM operation makes it difficult to achieve the engine's self-cleaning effect, easily causing carbon deposits in the engine and fuel system.
As a veteran driver with over 20 years of experience, I must say that low-gear high-rev driving is really pointless. In congested areas, some owners keep their cars in low gear for convenience, revving the engine high to achieve quicker starts, but this actually carries significant risks. The most immediate issue is the extra strain on the engine, with pistons and connecting rods wearing out faster due to high-speed friction—over time, the engine could even fail prematurely. Fuel consumption also spikes. A friend of mine who drove this way ended up spending hundreds more on gas each month and thousands on parts replacements during repairs—hardly worth it. This habit also increases the risk of engine overheating and breakdowns, making driving unsafe. I recommend developing the habit of timely gear shifts and avoiding the redline zone. Regular checks on the cooling system and oil condition can also help mitigate these issues and keep your car running longer.
