How long after purchasing a new car is it suitable to drive on the highway?

[Judah]

You can drive a new car on the highway at any time after purchase, just avoid running the engine at excessively high RPMs. New cars typically have a break-in period, during which they can be driven on highways. However, running the engine at high RPMs during this period can increase engine wear. Once the break-in period is over, it's important to schedule the first maintenance on time—neither earlier nor later. For the first maintenance, you can use either the manufacturer-recommended oil or another type of oil. In general, it's beneficial to perform regular maintenance and change the oil on time to keep the car in good condition.