Can I Change the Oil Filter Every Two Oil Changes?

[VanJasmine]

Changing the oil filter every two oil changes is theoretically possible, but it is best to replace the oil filter every time you change the oil. Draining the old oil: Place the waste oil pan properly, then use a wrench to loosen the oil drain plug counterclockwise, allowing the old oil to drip out. Removing the oil filter: After the oil has been drained, open the engine oil cap, use an oil filter wrench to loosen the oil filter counterclockwise, and then unscrew the oil filter from the engine compartment. Reinstalling the oil filter: Before installation, place a sealing ring over the oil outlet, then slowly screw the new oil filter into place. Do not overtighten the oil filter. Generally, hand-tighten it first, then use a wrench to tighten it an additional 3 to 4 turns. Finally, refill the oil tank with new oil.

[LaIsabelle]

I used to think about changing the oil filter only every other oil change to save trouble, until one service when I noticed the oil was unusually dark and realized the issue. The filter was full of metal shavings and sludge. The mechanic explained that an old filter contaminates the new oil, actually accelerating engine wear. Now, I always replace the filter with every 5,000 km oil change—after all, an engine overhaul costs tens of thousands, while a filter is just a few dozen bucks. Skimping on it long-term can clog oil passages, forcing expensive cleaning later. Definitely not worth it.

[DelAndres]

Having repaired cars for fifteen years, I recommend replacing the oil filter every time. Old filters accumulate metal particles, much like a dirty mask, significantly reducing filtration efficiency. If you change the oil but not the filter, the new oil gets contaminated quickly, doubling the wear on engine bearings. Some car owners claim extended-life filters can last two cycles, but domestic road conditions and fuel quality can't support that. The safest approach is to replace the filter with every oil change—don't penny-pinch at the cost of major damage.

[SophieRose]

Saving this small amount of money could cost you dearly. Last time I skipped changing the oil filter during maintenance, and after just 3,000 kilometers, the oil pressure warning light started flashing. When they opened it up, the filter paper was completely clogged and deformed. The mechanic said modern oil filters all have bypass valves—when clogged, they allow unfiltered oil to flow directly into the engine. Let's do the math: saving one filter by changing oil twice might save you 60 yuan at most, but the resulting cylinder scoring repairs would cost at least 3,000 yuan. It's absolutely not worth the risk.

[LaDiana]

A friend tried to save money by changing the oil twice before replacing the filter, which resulted in abnormal engine noise. Upon inspection, scratches were found on the bearing shells. The mechanic pointed at the filter, saying the impurities inside had clumped together like coal slag. Now I always insist on replacing both simultaneously—using new oil with an old filter is like pouring new wine through a dirty funnel, a complete waste. Moreover, the filter's rubber seal can degrade over time, potentially causing oil leaks, so replacing it every time gives me peace of mind.

[MatteoLynn]

As a car enthusiast, changing the oil filter with every oil change is my golden rule. The oil filter isn't just a container—its filter paper pores get clogged with contaminants, leading to insufficient oil flow. Modern engines have high precision, and a twice-used filter's efficiency drops to just 30%, essentially letting new oil circulate metal debris through the engine. Spending an extra 50 yuan on a new filter during each maintenance extends the engine's lifespan by tens of thousands of kilometers. That's an investment well worth it.