What is the best speed for a new car on the highway?

[Vivian]

For the first 500 kilometers, the new car must not be driven with heavy loads, and the speed should not exceed 80 km/h. Within 1000 kilometers, it can carry slightly heavier loads, but the driving speed should not exceed 100 km/h. Within 2000 kilometers, the driving speed should not exceed 120 km/h. More detailed explanations are as follows: 1. Running-in period: Before the car is assembled, each moving part is processed separately, and there are geometric deviations in the processing of parts. Therefore, after assembly, some moving parts may have direct local contact, making it difficult for lubricating oil to enter the friction surface, resulting in early wear. The running-in period is the time during which these directly contacting parts are worn down, and this period is called the running-in period. The running-in mileage for a new car is generally 1000 to 3000 kilometers. 2. Generally, it is best to wait until after the first maintenance because the oil used before the first maintenance is the first batch, which contains a large amount of debris. Using this oil for high-speed driving will greatly increase engine wear and may even cause abnormal wear. As a result, the vehicle after the running-in period may not be in the best condition.

[AlinaRose]

As a car maintenance expert, I believe driving a new car on the highway requires special attention. My experience is that the first 500 kilometers after delivery are a critical break-in period, during which it's best not to push for speed. Maintaining a speed between 100-110 km/h is ideal, never exceeding 120 km/h, and the engine RPM should absolutely not go beyond 3,000. I've seen cases where people immediately drove at 140 km/h after taking delivery, only to find slight cylinder wall scratches during the first maintenance. On the highway, remember to change lanes every hour to evenly distribute stress on the suspension system. After highway driving, don't turn off the engine immediately—let it idle for two minutes to cool down the turbo. While modern cars don't strictly require break-in periods, gentle driving will undoubtedly help your beloved vehicle maintain peak condition for longer.

[JulianFitz]

A veteran mechanic from three generations of car repairers told me that the first 300 kilometers of a new car are the most critical period to avoid aggressive driving. When driving on the highway, set the cruise control at 100 km/h, which is exactly the recommended speed for the middle lane on domestic highways. The key is to avoid sudden acceleration or deceleration—treat the throttle as if you're stepping on an egg with gentle pressure. Once, while helping inspect a seized engine, it turned out the owner had raced to 160 km/h on the very night they picked up the car. It's recommended to take a 30-minute break every 200 kilometers to allow the engine to cool down properly. Don’t believe the online myths about high-speed driving to remove carbon deposits—modern China VI-B compliant vehicles don’t require it at all.

[VonOlivia]

Last time when accompanying my friend to pick up his BMW, the salesperson repeatedly reminded not to let the tachometer exceed the blue zone. For regular family cars, maintaining around 2,500 RPM is most appropriate, which roughly translates to 90-100 km/h. Pay special attention on long uphill sections - many beginners mistakenly rev too high when climbing. The most extreme case I've seen was a new car reaching 4,000 RPM while climbing, triggering a transmission warning. After exiting the highway, remember to check the wheel hub temperature - excessive heat indicates unbedded brake systems. New brake pads require about 300 kilometers to reach optimal working condition.

[JoshuaLee]

Old Wang next door has been running an auto repair shop for over a decade. He always says that running a new car on the highway is like an athlete warming up. The optimal speed range is around 110 km/h, which is both fuel-efficient and gentle on the car. He particularly advises against driving continuously for more than 3 hours before the first maintenance, as rubber components can overheat and deform. Last month, a customer had a leaking axle seal due to long-distance driving. It's best to choose off-peak hours for highway driving to avoid congested conditions with frequent braking. After arrival, check the oil dipstick—it's normal for new engines to consume a small amount of oil during the break-in period.

[Willie]

At the manufacturer's test drive event last time, the engineer said the break-in period should be treated like new leather shoes. They recommended maintaining a steady speed of 90-100 km/h on highways, which allows piston rings to properly seat against cylinder walls while also breaking in transmission gears. Three behaviors must be avoided: flooring the accelerator from standstill, coasting in neutral on long downhill stretches, and sudden braking. I once monitored with an OBD scanner and found engine load at 110 km/h was actually lower than during city driving. But remember to adjust tire pressure to 2.5 bar - new cars often have overinflated factory settings, posing blowout risks during high-temperature driving.