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When You Change Your Oil, Do You Have To Change The Filter?

Published in Car Maintenance 3 mins read

Technically, you don't have to get the oil filter changed with every oil replacement, but it is still a good idea to do so. While some might skip it occasionally, replacing the oil filter along with the oil ensures optimal engine health and performance.

Understanding the Role of Your Oil Filter

Your car's engine oil plays a crucial role in lubricating moving parts, reducing friction, and dissipating heat. As the oil circulates, it picks up various contaminants such as dirt, metal particles, sludge, and unburnt fuel residue. This is where the oil filter comes in.

  • Contaminant Removal: The oil filter acts as a screen, trapping these larger contaminants before they can circulate through the engine and cause damage.
  • Maintaining Oil Purity: By keeping the oil clear of debris, the filter helps maintain the oil's effectiveness and prolongs the life of your engine components.

Why Replacing the Filter is Recommended

Even if you're using a high-quality, long-life oil, the filter itself collects debris over time. A used filter, even if not completely clogged, will have reduced efficiency.

Here's why replacing your oil filter with every oil change is beneficial:

  • Optimal Filtration: A new filter provides peak filtration efficiency, ensuring the cleanest possible oil circulates through your engine.
  • Prevents Contamination of New Oil: If you put fresh, clean oil into an engine with an old, dirty filter, the new oil will immediately begin to pick up contaminants already trapped in the old filter or that bypass a compromised filter.
  • Ensures Smooth Operation: As the reference states, "replacing it at the same time that you get an oil change makes sure that everything can run smoothly." A clean filter allows for proper oil flow and lubrication, reducing wear and tear on vital engine parts.
  • Cost-Effectiveness: Oil filters are relatively inexpensive components. The cost of replacing a filter is minimal compared to potential engine damage caused by poor filtration.
  • Manufacturer Recommendations: Most vehicle manufacturers and oil change professionals recommend changing the oil filter with every oil change.

Practical Considerations

While technically you can skip the filter change occasionally, it's generally not a recommended practice for long-term engine health. Modern engines operate with tighter tolerances, making clean oil even more critical.

  • Standard Practice: Most quick lube services and certified mechanics will automatically include an oil filter replacement with every oil change as part of their standard procedure.
  • Filter Quality: When replacing, consider using a good quality oil filter that meets or exceeds your vehicle manufacturer's specifications.

In conclusion, while not strictly "required" in a technical sense every single time, changing your oil filter with every oil replacement is a highly recommended practice that safeguards your engine and ensures its longevity.