Yes, when you change the engine oil, you usually need to change the oil filter as well. Here are some reasons why you should change the oil filter at the same time you change the oil:

1. Filtration efficiency: With the growth of use time, the oil filter will gradually accumulate impurities, and its filtration efficiency will decrease. If the filter is not replaced, the new oil can quickly become contaminated.
2. Prevent clogging: The old oil filter may be clogged due to the accumulation of too much impurities, which will cause the oil to not flow normally, which will affect the lubrication of the engine.
3. Maintain consistency: New oil and clean oil filters ensure optimal engine protection and performance. If only the oil is replaced without replacing the filter, the performance of the new oil may not be fully developed because of the limitations of the old filter.
4. Extend engine life: Regular replacement of oil and oil filter is one of the key measures to extend engine life. Keeping the oil clean reduces wear and tear inside the engine.
5. Manufacturer's recommendation: Most car manufacturers recommend changing the oil filter at the same time as changing the oil in their maintenance manuals.

Therefore, in order to ensure that the engine is always operating in optimal condition and to follow the maintenance recommendations of the automobile manufacturer, the oil filter should be changed at the same time when the oil is changed. In general, the oil and oil filter replacement cycle is consistent, but the specific replacement cycle may vary depending on the vehicle model, conditions of use, and manufacturer's recommendations.