Is 120 km/h at 1500 RPM Normal?

[AnastasiaRose]

120 km/h at 1500 RPM is not normal, the normal RPM range should be between 2000 and 3000. The following are the maintenance precautions for car engines: Use high-quality engine oil: Engine oil, which serves as the lubricant for the engine, provides lubrication, cleaning, cooling, sealing, and wear reduction. Only by using qualified lubricating oil can you reduce the wear of engine components and extend their service life. Therefore, it is important to always use high-quality lubricating oil. Regularly clean the car's fuel system: To maintain the engine, it is essential to properly care for the fuel system. Regularly cleaning the car's fuel system can control the formation of carbon deposits, keeping the engine in optimal condition. Periodically clean the radiator scale: Rust and scale buildup in the engine radiator are common issues. Rust and scale can restrict the flow of coolant in the cooling system, reducing heat dissipation and causing the engine to overheat, which may even lead to engine damage. Therefore, in daily maintenance, it is necessary to choose a coolant with the appropriate ratio based on specific conditions.

[GideonFitz]

Driving at a speed of 120 km/h with the engine running at 1500 RPM is actually quite normal, especially if the car is an automatic or equipped with an efficient transmission system, such as CVT or dual-clutch. I've driven many cars where, during highway cruising at a steady 120 km/h, the transmission shifts to a higher gear to maintain low RPM for fuel efficiency and to prevent the engine from overworking. However, it depends on the specific model: some fuel-efficient economy cars, like certain Japanese or German models, operate optimally around 1500 RPM; for manual transmissions, it might be necessary to check if the correct gear is engaged. Too low RPM might slightly affect acceleration response, but generally, it's not a major issue. Regular maintenance of the transmission and engine ensures this state remains sustainable, helping to reduce wear. Overall, if the acceleration is smooth, fuel consumption is reasonable, and no warning lights are on, it's considered healthy operation.

[LeSadie]

When I encounter similar issues, like a car speed of 120 km/h with an engine speed of 1500 rpm, this is a common design in modern vehicles, especially those with automatic transmissions. When the car's transmission is in a high gear, the engine speed naturally remains lower, which improves fuel efficiency. I've personally experienced how comfortable this setup feels when driving on highways. However, it's important to note that if the engine speed is too low, causing engine shaking or sluggish acceleration, it might indicate a minor issue with the transmission lock-up or control module, which needs to be checked. Different engine types also play a role: gasoline engines tend to run more smoothly at such speeds compared to diesel engines. For maintenance, regular checks of transmission fluid and sensors are crucial, and prolonged low-speed operation should be avoided to prevent carbon buildup. Overall, as long as the driving feels smooth and there are no unusual noises, it's functioning normally.

[JesseLee]

Maintaining 1500 RPM at 120 km/h is generally not a major issue and is common in efficiently designed vehicles. If the transmission is economy-oriented, it can sustain low RPM to save fuel and reduce emissions. However, excessively low RPM may result in insufficient power during uphill climbs or overtaking, potentially compromising safety. It's important to monitor whether acceleration response is prompt. Adjusting driving habits according to different road conditions can help avoid potential risks.