Keeping a Subaru engine running smoothly requires regular maintenance, particularly using the right engine oil and oil filter. A high-quality oil filter is essential to protect your engine from harmful contaminants that can reduce performance and shorten its lifespan.
In this post, we’ll explore the five best oil filters suited for Subaru vehicles, based on reliability, filtration efficiency, and user satisfaction.
Subaru Engine Oil Filter
1. Subaru OEM 15208AA15A Engine Oil Filter
This is the genuine oil filter manufactured specifically for Subaru engines. It’s designed to match the internal specs of Subaru vehicles, ensuring perfect fitment and optimal performance.
Key Features:
- Exact match for most Subaru engines (Forester, Impreza, Legacy, Outback, etc.)
- Made by the Original Equipment Manufacturer
- Includes factory-quality internal bypass valve
- Built with high-efficiency media for extended filtering
- Comes with a crush washer for the drain plug
This filter is the go-to for many Subaru enthusiasts who prefer OEM components for peace of mind.
2. FRAM Ultra Synthetic XG7317 Engine Oil Filter
FRAM’s Ultra Synthetic filter is a high-end option known for its dual-layer synthetic media and long service intervals. It’s ideal for Subaru owners who use synthetic oil and want top-tier filtration.
Key Features:
- 99%+ dirt removal efficiency at 20 microns
- Designed for up to 20,000 miles of protection
- Durable silicone anti-drainback valve
- Dual-layer synthetic filter media
- Strong metal screen backing for structural integrity
This filter is perfect for drivers who go for longer intervals between oil changes or frequently drive under tough conditions.
3. Bosch 3330 Premium FILTECH Oil Filter
Bosch is a respected name in automotive parts, and the 3330 Premium FILTECH filter brings advanced filtration to Subaru engines. It’s a dependable upgrade from standard filters.
Key Features:
- FILTECH media technology screens out more harmful contaminants
- Strong steel base plates and housings prevent warping and leaks
- Silicone anti-drainback valve for extended life
- Compatible with most Subaru engines
- Great performance for both conventional and synthetic oils
Bosch 3330 is a solid, affordable choice for anyone looking to go beyond OEM without breaking the bank.
4. Mobil 1 M1-108A Extended Performance Oil Filter
The Mobil 1 M1-108A is engineered for extended oil change intervals and optimized for synthetic motor oils. It provides premium protection with outstanding filtration capacity.
Key Features:
- Rated for up to 20,000 miles with synthetic oil
- 99.6% multi-pass efficiency rating
- Advanced synthetic fiber blend media
- Strong canister for high-pressure resistance
- Silicone anti-drainback valve to reduce dry starts
For Subaru drivers who prioritize performance and extended maintenance intervals, this is a top contender.
5. K&N HP-1008 Performance Wrench-Off Oil Filter
K&N’s HP-1008 is built for performance-focused vehicles, including Subaru WRX and turbocharged engines. Known for its wrench-off design, it’s easy to install and remove, even in tight engine bays.
Key Features:
- Heavy-duty canister for high-pressure environments
- 99% filtration efficiency using synthetic media
- Built-in 1-inch nut for easy removal
- Compatible with conventional and synthetic oils
- Designed to support high-flow oil systems
This filter is ideal for DIYers and performance enthusiasts who want an easy-to-service, high-efficiency filter.
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FAQs
Do Subarus need a special oil filter?
Yes, Subarus typically require a specific type of oil filter that is compatible with their unique boxer engine design. While not necessarily “special” in a proprietary sense, the oil filter must meet Subaru’s pressure and filtration requirements.
Genuine Subaru OEM filters (e.g., part number 15208AA15A or 15208AA12A) are designed specifically for Subaru engines and include the correct bypass valve and anti-drainback valve to prevent dry starts. Aftermarket filters like FRAM, Mobil 1, or Bosch may also be used, but it’s critical they meet or exceed OEM specs.
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How long does a Subaru oil filter last?
The lifespan of a Subaru oil filter depends on the type of oil used and driving conditions:
- With conventional oil: Replace the filter every 3,000 to 5,000 miles.
- With synthetic oil: A high-quality filter can last up to 7,500 to 10,000 miles, and in some cases up to 20,000 miles if it’s an extended performance model (e.g., Mobil 1 or FRAM Ultra).
However, it’s generally best to replace the oil filter with every oil change to ensure consistent engine protection.
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How much is a Subaru engine filter?
Subaru engine oil filters typically cost:
- OEM Subaru filters: Around $6 to $12
- High-performance aftermarket filters: Range from $10 to $20 depending on the brand and features
What type of oil does Subaru recommend?
Subaru recommends oil types based on the specific model and engine. The most commonly recommended oils are:
- 0W-20 synthetic oil: For most newer Subaru models, including the Forester, Outback, Crosstrek, and Legacy with non-turbo engines.
- 5W-30 or 5W-40 synthetic oil: For older models or those with turbocharged engines (like the WRX or STI).
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Can you change a Subaru oil filter without draining oil?
Yes, you can change the oil filter without draining the engine oil, but it’s not typically recommended. If you do:
- Some oil will likely spill out from the filter housing, so be prepared to catch it.
- The old oil in the engine will not be refreshed, which defeats the purpose of full maintenance.
- Subarus often have top-mounted oil filters, making them more accessible for separate replacement, but changing the oil and filter together is still best practice.
To maintain engine health, it’s ideal to change both oil and filter simultaneously during routine service.
Final Thoughts
Choosing the right engine oil filter is one of the most important steps in maintaining the health of your Subaru engine. Whether you drive a rugged Outback, a turbocharged WRX, or a dependable Legacy, all these filters provide excellent protection and are compatible with a wide range of Subaru models. While OEM filters remain a safe, reliable option, premium filters like those from FRAM, Bosch, Mobil 1, and K&N offer excellent alternatives with superior filtration and longevity.
