What are the consequences of prolonged engine speed below 2000 RPM?

[IanLynn]

The consequences of prolonged engine operation below 2000 RPM include excessive carbon buildup, and it is advisable to drive at higher speeds appropriately. Below are specific explanations of why prolonged low-speed driving can cause significant damage to vehicles: 1. Excessive carbon deposits: Incomplete combustion occurs when the engine operates at low RPM for extended periods, preventing full power output and leading to substantial carbon buildup. 2. Accident risks: Prolonged low-speed driving increases the likelihood of side-swiping incidents when being overtaken by other vehicles, which can easily lead to accidents. 3. Increased fuel consumption: The optimal fuel efficiency speed for passenger cars is 90 km/h. Driving either below or above this speed will result in higher fuel consumption. When driving, it is important to adjust speed timely, accurately assess road conditions, and drive cautiously.

[McChristian]

I've been driving manual transmission cars for over twenty years, often in low-speed urban conditions with the engine RPM consistently below 2000. Back then, I didn't know better, and carbon deposits built up heavily inside the engine. I noticed the fuel consumption gradually increased, the power weakened, and acceleration felt sluggish. Later, an experienced car enthusiast pointed out that low RPM leads to incomplete combustion, which also affects the exhaust system and may shorten the lifespan of the catalytic converter. I even personally experienced a clogged spark plug once, making the car hard to start, and had to spend a considerable amount on repairs. They suggested occasionally driving on highways or giving it a harder throttle to raise the RPM above 2500, helping to flush out carbon deposits and keep the engine running smoothly. Overall, driving like this long-term harms the car and costs more money—it's better to adopt a more spirited driving style in daily use.

[LeNadia]

As an average car owner who frequently drives an automatic transmission vehicle in congested areas, the engine RPM always stays low. I feel prolonged low-RPM operation makes the engine quieter but causes hidden internal issues. For instance, incomplete fuel combustion leads to severe carbon buildup, potentially damaging the oxygen sensor. Turbocharged vehicles suffer worse - insufficient boost pressure affects power output. Fuel efficiency also deteriorates, with each tank covering dozens fewer kilometers, which isn't cost-effective. I've also noticed increased vibration at idle, indicating accelerated component wear. Occasionally adding high-RPM driving, like weekend suburban trips, helps maintain the car's health.

[Hernandez]

I always drive carefully when picking up and dropping off my kids, trying to start gently and cruise smoothly. Keeping the RPM below 2000 became a habit, but later I discovered engine issues. Dirt built up inside the engine, like the car was slowly being poisoned, leading to clogged spark plugs or stuck piston rings. Not only did acceleration feel weak, but slow starts also compromised safety. I was even more worried about foul-smelling exhaust polluting the air. I learned that regularly cleaning the throttle can help, but the real solution is changing driving habits. Now, I make sure to occasionally step on the gas and rev the engine high for a while—the car runs much better afterward.