The best and most reliable answer to this question is in the service book or the owner’s manual of your car.
The average oil change interval in the engine of a passenger car is 10,000 km. Of course, there are motor oils that allow a change interval of once every 30,000–40,000 km. Such oils are usually used in the engines of modern commercial vehicles. As for oil changes in agricultural or construction machinery, the service life there is measured not in kilometres but in engine hours, because this machinery most often works without moving, and when it does move, it moves very slowly. For this reason, most modern oils have a service life of 200–500 engine hours before a change.
