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Air filter for Subaru Forester SF5 sti is oily?

It is not recommended to use an oily air filter in your Subaru Forester SF5 STI. Oily air filters can restrict airflow and reduce engine performance. They can also cause premature wear on the engine's components.

Instead, it is recommended to use a dry air filter. Dry air filters are more efficient at capturing dirt and debris, and they do not restrict airflow. This will help to keep your engine running at peak performance and prevent premature wear.

If you are concerned about the air quality in your area, you can also consider using a pre-filter. A pre-filter can help to capture larger particles of dirt and debris before they reach the main air filter. This can help to extend the life of the main air filter and keep your engine running at peak performance.