While technically possible, changing your oil without replacing the oil filter is not recommended. It's far better practice to replace both simultaneously.
Why You Shouldn't Skip the Oil Filter Change
- Contaminated Oil: Leaving the old, clogged filter in place means the new oil will immediately mix with the remaining dirty oil trapped within the filter. This defeats the purpose of the oil change, leaving your engine with sub-optimal lubrication. Reddit users highlight this issue, noting that you'll essentially recirculate dirty oil.
- Clogged Filter: A clogged filter restricts oil flow, potentially leading to reduced engine performance and increased wear on engine components. Quora emphasizes the risk of unknown amounts of debris within the filter.
- Engine Damage: Prolonged use of a clogged filter can lead to significant engine damage due to insufficient lubrication. The lack of proper filtration can cause wear and tear on critical engine parts.
When It Might Seem Acceptable (But Still Isn't Ideal)
Some sources suggest that if you are changing your oil more frequently than usual, skipping a filter change might be less damaging, but this is still not ideal. BobIsTheOilGuy mentions this scenario, but strongly implies filter replacement is the best practice. The small amount of old oil remaining after an oil change is insignificant compared to the dirty oil trapped within the filter.
Conclusion
Replacing both your engine oil and the oil filter together ensures optimal engine protection and performance. Skipping the filter change is a shortcut that compromises engine health. Even though you can change the oil without changing the filter, you shouldn't.
