Why Can a New Car Only Run at 80?

2 Answers
DeJayden
07/25/25 2:43pm
Because the car needs a break-in period initially. If the speed is too high, the car's components may not be properly broken in, which could lead to potential hazards. In short, 80 mph is not too slow; after about a month of break-in, you can increase the speed. Warm up the car before starting during the break-in period: For fuel-injected cars, turn the key to the second position and wait for 5-10 seconds before starting. Avoid overloading: Running a new car at full load can damage the components. Therefore, within the first 1,000 kilometers, domestic cars should not exceed 75-80% of the rated load, and imported cars should not exceed 90% of the rated load. Avoid long-distance trips: Taking a new car on long trips will cause the engine to run continuously for extended periods, leading to increased wear on the components.
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HaydenLee
08/11/25 9:11pm
This new car can only reach 80 mph now, probably because it's still in the break-in period. After leaving the factory, components like the engine and transmission need time to adapt. If you drive at high speeds right away, it can cause metal wear or overheating damage. Manufacturers usually recommend maintaining moderate to low speeds during the initial few thousand kilometers of the break-in period, such as below 80 mph, to protect the engine and allow parts to mesh better. Additionally, the fuel system may not be fully lubricated yet, so driving at high speeds directly would result in lower fuel efficiency. Once the break-in period is over, most cars can lift the speed restriction for highway driving. If the issue persists after the break-in period, check for any abnormalities in the engine or computer system. It's advisable to refer to the owner's manual for scheduled maintenance and avoid rushing to increase speed.
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