Is it necessary to replace the oil filter when changing the engine oil?

[LeJasmine]

It is necessary to replace the oil filter when changing the engine oil. Here is the relevant content introduction: 1. The oil filter can filter out impurities in the engine oil flowing through the lubrication system. After the engine operates for a period of time, some impurities will be produced. These impurities mainly fall into two categories: one is metal shavings worn off from engine parts during operation, and the other is black sludge-like organic matter produced by chemical changes when the engine oil is in a high-temperature state during engine operation. These impurities will mix with the engine oil and circulate through the lubrication system. 2. The filtering performance of the oil filter will weaken over time until it fails. Road dust and high-temperature-oxidized carbides mix with moisture and enter the engine oil, and these useless substances are filtered by the oil filter.

[LeJames]

When changing the engine oil, it's best to replace the oil filter at the same time. I've been in the auto repair business for over a decade and have seen all kinds of situations. The oil filter is responsible for filtering out impurities from the oil. When it gets old, it tends to clog up, and the new oil gets contaminated immediately, leading to poor filtration. Over time, this increases engine wear, raises fuel consumption, and may even cause overheating issues. This is no small matter. Every time I handle maintenance orders, I insist that customers replace the oil filter simultaneously. Although it costs a bit extra, it saves a lot of trouble. The manual usually recommends this practice, especially for city driving or frequent highway driving, where the filter bears a heavier load. If neglected, the oil's lifespan can be cut in half, and repairing a damaged engine becomes much more expensive. Developing this habit ensures smoother driving and is definitely cost-effective in the long run.

[StGenesis]

I think it's more convenient to change the oil filter every time I change the engine oil. As an ordinary car owner who has been driving for fifteen years, I always follow the advice of the repair shop. The oil filter plays a significant role in filtering out metal shavings and sludge. If you don't replace the old one, the new oil will quickly get contaminated. During DIY maintenance, if you skip changing the filter, you might notice abnormal fuel consumption and unusual engine noises. The manual clearly states that the filter should be replaced with every oil change—it's not expensive, just a few dozen bucks each time. Skipping it might be fine for short trips, but it's risky for long-distance driving, as the car's performance will degrade faster. This habit has kept my car well-maintained, saving both money and hassle. I recommend everyone follow this practice—don't risk major issues to save a small amount.

[KylieDella]

Changing the oil filter is a must during an oil change! As a young car enthusiast who frequently tinkers with cars, I fully understand the importance of the oil filter. It filters out contaminants, and when it gets clogged over time, it restricts oil flow, affecting engine response and power. New oil can become dirty within days, leading to noticeable performance degradation. Especially for performance cars, don't skimp on this expense—a failing filter can ruin the acceleration feel. Consistently replacing both together is a simple and effective maintenance practice that keeps your car running smoothly. The manual emphasizes performing these operations simultaneously—don't take shortcuts.

[McJayden]

When I was young and reckless about car maintenance, I sometimes skipped changing the oil filter to save money. As a result, the engine oil deteriorated quickly, and minor engine issues emerged. This experience taught me to always replace both simultaneously. I now see the oil filter as a guardian - when old, it accumulates contaminants, reducing the filtration efficiency of new oil. While saving a few dozen yuan per change might seem tempting, the long-term protection for engine longevity is invaluable. The manual recommends replacing it every time, and skipping it may offer short-term savings but leads to greater long-term costs. After years of driving, I've made it a steadfast practice to replace the filter with every maintenance, ensuring reliable vehicle upkeep.