How many kilometers can a new car drive on the highway?

[Yvette]

A new car can be driven on the highway at any time, just avoid running the engine at excessively high RPMs during the journey. New cars have a break-in period after purchase, during which they can be driven on highways as long as the engine is not operated at excessively high RPMs. Running the engine at high RPMs during the break-in period can increase engine wear. After the break-in period, it is recommended to drive the car at high speeds to enhance engine performance. This is because, after the initial break-in, the components of the engine operate more smoothly together. Driving at high speeds for a period allows testing of the engine's performance under extreme conditions and expands the tolerance limits of the components in terms of tensile, compressive, impact, and torsional resistance.

[Arianna]

When I first got my new car, I also struggled with this issue. Now, after driving it for five years, I finally figured it out. The key is actually the break-in period, which varies for different cars, but it's generally recommended to drive 1,000-2,000 kilometers before hitting the highway for safety. My German car wasn't taken on long trips until after 2,000 kilometers, and for the first two months, I just drove it slowly in the city. You see, a new car's engine is like a young lad—running it at 120 km/h on the highway right away can strain it, so keeping the RPM below 3,000 is safest. Before taking the highway, always check tire pressure and the oil dipstick, and make sure the spare tire is properly inflated. A friend of mine once overlooked this and ended up waiting two hours at a service area. New cars these days are indeed built tough, but playing it safe never hurts—after all, repair costs are way more expensive than the time you save.

[ArielAnn]

I remember when I bought my first manual transmission car, veteran drivers all said it needed a break-in period of 3,000 kilometers. Nowadays, cars really don't require such meticulous care. When I changed to an SUV last year, I drove it on the highway right on the day I picked it up. A technician at the 4S dealership privately told me that engines now undergo cold run-in at the factory. As long as you don't floor the accelerator or slam on the brakes, highway driving can actually help clear carbon deposits. However, it's recommended to take it easy for the first 500 kilometers, keeping the speed under 100 km/h for peace of mind. Once, when I took my new car on a business trip, I deliberately took the national highway for 800 kilometers before daring to hit the expressway, only to meet an owner of the same car model at a service area who said he drove 400 kilometers on the highway right after picking up his car with no issues at all. Looking back now, I realize I took an unnecessary detour. As long as you don't speed and maintain a safe distance, a new car can handle highway driving anytime.

[StAaron]

Last week, while accompanying a relative to pick up their new car, I specifically asked the maintenance supervisor. He suggested breaking in the car in three phases: avoid sudden acceleration for the first 500 kilometers, short highway trips are acceptable from 501 to 1,500 kilometers, and normal driving is only recommended after 1,500+ kilometers. The biggest issue with taking a new car on the highway is the tires—factory tire pressure is often two to three points higher than recommended, increasing the risk of a blowout at high speeds. Once, while helping a colleague drive their new car, I noticed slight steering wheel vibrations. Checking the manual revealed that continuous high-speed driving should be avoided for the first 200 kilometers. Nowadays, many cars come with smart systems that make things easier, like mine which actively reminds me about gear shifts and maintenance. In short, the break-in period should be treated like teaching a child to walk—proceeding step by step is the safest approach.

[DeJosiah]

I had a debate with my neighbor about driving a new car on the highway. He insisted on waiting until after 5,000 kilometers. After checking the maintenance manual, I learned the key lies in the engine RPM—keeping it between 2,000 and 4,000 RPM for the first 1,600 kilometers is ideal. Once, I drove a friend's unbroken-in new car on the highway, and when I floored the gas pedal, I clearly felt power lag. The mechanic said it was due to the piston rings not being fully sealed. Later, when I got a new car myself, I first drove about three tanks of fuel (roughly 1,500 kilometers) in the city to let the transmission fully adapt to the shifting rhythm before hitting the highway, and it was much smoother. Even windshield wiper blades need breaking in—last time during a heavy rainstorm on the highway, I realized the new wipers were skipping, nearly causing an accident. Never skip the break-in period just to save trouble.

[CharlotteFitz]

New cars are most afraid of engine overheating on highways. A friend who works as a test driver for a manufacturer taught me a trick: for the first 300 kilometers, turn off the engine and rest for ten minutes every half hour of driving. During the break-in period of my American car, I paid special attention to the coolant temperature gauge. Once in summer, while driving on the highway, I noticed the needle approaching the red line and immediately pulled into a service area for inspection—it turned out the coolant wasn’t filled to the proper level. Now, before every long trip, I always check three fluid levels: engine oil, brake fluid, and coolant. Last month, when helping my cousin pick up his new car, he drove straight home at 120 km/h, only for the new car to trigger an engine fault alarm, resulting in a repair bill of over 5,000 yuan. It’s recommended to drive at least one-third of the mileage required for the first maintenance, and extra caution is needed for turbocharged cars.