Can a new car run at 120 km/h on the highway?

[DeWalker]

New cars should not run at 120 km/h on the highway. Although new cars have undergone run-in after leaving the factory, the surfaces of the parts are still relatively rough. During the break-in period, it is essential to control the driving speed and avoid excessively high speeds. The speed should be maintained between 50 to 80 km/h. After driving 1,500 kilometers, the engine speed and vehicle speed can gradually be increased to the maximum allowed by the vehicle. Avoid pressing the accelerator pedal too hard in a new car to ensure that the pistons, cylinders, and other critical components increase their load under moderate conditions. This allows the parts to fully contact, rub, adapt, and settle, improving the ability of various components to adjust to the environment and smoothing out any protrusions on the parts. The quality of the break-in process will significantly impact the car's lifespan, safety, and fuel efficiency.

[LeKatherine]

I just bought a new car last month and couldn't wait to test it on the highway at 120 km/h. It performed quite impressively, running smoothly without any feeling of instability. Since the new engine is still in the break-in period, the manual recommends keeping the speed below 100 km/h for the first 1,000 kilometers to avoid putting too much stress on the engine. I drove at 120 km/h for a long stretch, and after checking, the engine oil and tire conditions were fine, with fuel consumption averaging around 7 liters per 100 km. However, it's important to remind everyone to maintain a safe distance and be mindful of weather conditions on the highway, as the braking system of a new car might not be fully broken in yet. Regularly checking tire pressure and sticking to the maintenance schedule is also crucial—don't risk damaging your new car just for speed.

[OEverett]

With years of driving experience, I can confidently say that new cars can easily handle 120 km/h without issues. Several new cars I've driven reached this speed effortlessly. Engine design and materials have improved significantly, and modern vehicles undergo high-speed testing before leaving the factory, ensuring they can withstand continuous operation. However, during the break-in period, it's advisable to avoid frequent sudden acceleration; maintaining a steady speed is ideal to help engine components gradually adapt. I recommend paying attention to transmission smoothness and fuel consumption changes when driving at 120 km/h on highways. The fuel consumption shouldn't increase much at this speed, but consistently high RPMs might affect engine longevity. After high-speed driving, a quick check of the cooling system and chassis condition is wise to ensure no abnormal vibrations or noises. The key is to obey speed limits, adjust speed according to road conditions, and always prioritize safety.

[McLyla]

From my understanding of new car maintenance, driving at 120 km/h on the highway is not an issue. The engine has been factory-tested to its limits, and 120 km/h falls within the normal range. However, it's best to drive gently for the first few hundred kilometers to allow the piston rings and bearings to gradually break in. Excessive speed may lead to increased oil temperature or accelerated component wear. From a safety perspective, 120 km/h is legal in speed-limited zones, but attention should be paid to road conditions and vehicle stability, avoiding sharp turns or sudden braking. It's advisable to check tire wear and braking performance after highway driving.

[SanAmir]

It is technically feasible for a new car to reach 120 km/h on the highway. Driving at 120 km/h during the break-in period poses minimal risk, as most vehicle manuals allow gradual acceleration after low-speed testing. The engine cooling system is well-designed, so high-speed operation is not an issue. I recommend avoiding prolonged cruising at this speed, as the car's components are still adjusting. Occasional short highway trips at 120 km/h are acceptable, adjusting speed based on road conditions. Legally, ensure the local highway speed limit does not exceed 120 km/h to avoid unnecessary fines. After high-speed driving, remember to perform the first maintenance, including an oil change. Develop the habit of monitoring the dashboard for any abnormalities to ensure safe and worry-free driving.