Selecting the right oil filter for your Subaru Outback is critical for engine longevity. We researched manufacturer specifications, industry standards (including SAE J1858 and ISO 4548-12), and aggregated owner feedback to evaluate the top options. Our comparison focuses on filtration efficiency, burst strength, anti-drain back valve reliability, and compatibility with Subaru’s boxer engine. Below are our findings, with honest assessments of each filter’s strengths and limitations.
| Photo | Product | Score | Buy |
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Subaru Genuine Oil Filter (15208AA15A) Top Pick Thread: M20x1.5; Bypass valve setting: 23 psi; Anti-drain back valve: silicone |
9.0 | 🛒 Check Price |
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Mobil 1 Extended Performance Oil Filter (M1-110) Runner Up Thread: M20x1.5; Burst strength: 300 psi; Media: Synthetic blend |
8.7 | 🛒 Check Price |
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WIX Oil Filter (57055) Best Value Thread: M20x1.5; Media: Cellulose/synthetic; Burst: 250 psi |
8.4 | 🛒 Check Price |
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Bosch Premium Oil Filter (3323) Solid Choice Thread: M20x1.5; Media: Synthetic; Anti-drain back valve: silicone |
8.1 | 🛒 Check Price |
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PurolatorBOSS Oil Filter (PL14615) Heavy Duty Thread: M20x1.5; Media: Wire cloth reinforced synthetic; Burst: 350 psi |
7.8 | 🛒 Check Price |
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Fram Ultra Synthetic Oil Filter (XG11060) Long Life Thread: M20x1.5; Media: Synthetic; Burst: 200 psi (estimated) |
7.3 | 🛒 Check Price |
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STP Extended Life Oil Filter (S11060XL) Budget Thread: M20x1.5; Media: Cellulose; Burst: 150 psi (estimated) |
7.0 | 🛒 Check Price |
1. Subaru Genuine Oil Filter (15208AA15A): Top Pick
The Subaru Genuine Oil Filter (15208AA15A) is the benchmark for Outback oil filtration. In our evaluation, it consistently meets Subaru’s strict bypass valve setting of 23 psi, which is critical for proper oil flow in the boxer engine’s variable oil pump system. The silicone anti-drain back valve is a standout feature: it seals effectively even after extended parking, reducing startup wear. Based on owner feedback across multiple Outback forums, this filter rarely causes leaks or pressure drops, making it a reliable choice for those prioritizing warranty compliance and peace of mind.
However, the genuine filter’s premium pricing is a real limitation. For budget-conscious owners, the cost per filter can be double that of aftermarket alternatives. We recommend this filter for Outback owners who want zero fitment risk and maximum engine protection, especially if the vehicle is still under warranty. If you change oil frequently and prefer lower cost, consider the next pick.
- OEM specification ensures perfect fit and flow for all Subaru Outback engines
- Silicone anti-drain back valve prevents dry starts and maintains oil pressure
- High burst strength (over 300 psi) exceeds typical aftermarket filters
Pros: Guaranteed compatibility and performance per Subaru engineering; Reliable construction with quality control from the manufacturer
Cons: Higher cost per filter compared to most aftermarket options
2. Mobil 1 Extended Performance Oil Filter (M1-110): Runner Up
The Mobil 1 Extended Performance M1-110 is a strong aftermarket alternative. We compared its spec sheet to OEM requirements and found the bypass valve setting (22-25 psi) and burst strength (300 psi) are well within Subaru’s parameters. The synthetic blend media captures particles down to 20 microns at 99% efficiency, which is superior to many conventional filters. Based on owner feedback from Outback owners using extended drain intervals, this filter maintains oil pressure consistently over 15,000 miles without clogging.
One real weakness is its slightly shorter canister height (about 3.1 inches vs OEM’s 3.3 inches). This can cause fitment issues with some aftermarket oil cooler adapters that require a taller filter. Also, the gasket is nitrile rubber rather than silicone, which may degrade faster in extreme heat. We recommend this filter for Outback owners who use synthetic oil and want extended protection, but skip it if you have any non-OEM oil cooling components.
- Synthetic blend media provides high efficiency (99% at 20 microns) for extended drain intervals
- Silicone anti-drain back valve and nitrile gasket resist high heat and pressure
- Compatible with synthetic oils and recommended for up to 20,000 miles (per manufacturer)
Pros: Excellent filtration efficiency for long oil change intervals; Robust construction with metal end caps and center tube
Cons: Slightly shorter than OEM, may not fit some aftermarket oil cooler adapters
3. WIX Oil Filter (57055): Best Value
The WIX 57055 is a popular budget-friendly option that we evaluated as a solid choice for Outback owners on a standard 5,000-7,500 mile oil change schedule. Its cellulose/synthetic media filters reasonably well, and the steel center tube resists collapse under normal pressure. Based on aggregated owner reviews, most users report no issues with leaks or pressure drops during routine driving. The filter meets Subaru’s thread and gasket dimensions perfectly.
However, its burst strength of 250 psi is lower than OEM and premium filters. In cold climates where oil viscosity is higher, or if the bypass valve sticks, this could be a concern. We recommend the WIX 57055 for Outback owners who change oil regularly and do not subject their engine to extreme loads or racing. Skip this filter if you often drive in severe conditions or use extended drain intervals.
- Excellent value with consistent filtration performance at a lower price point
- Cellulose/synthetic blend media offers good efficiency for standard oil change intervals
- Steel center tube and base plate provide adequate durability
Pros: Low cost without sacrificing basic filtration needs; Widely available and trusted brand among DIYers
Cons: Lower burst strength (250 psi) may be insufficient for high-performance use or extreme conditions
4. Bosch Premium Oil Filter (3323): Solid Choice
The Bosch Premium 3323 is a mid-range filter that we found offers decent performance for most Outback drivers. Its synthetic media and silicone anti-drain back valve are features typically found in higher-priced filters. The filter’s dirt-holding capacity is adequate for 5,000-7,500 mile intervals. Based on owner feedback, the filter seals well and does not cause oil leaks when properly torqued.
A real limitation is the smooth canister surface, which can make removal challenging if the filter is overtightened or corroded. Some owners have reported needing a strap wrench or filter pliers to get a grip. Additionally, the burst strength is not published, but third-party tests suggest it is around 200-220 psi, which is lower than OEM. We recommend this filter for Outback owners who want a reliable silicone anti-drain back valve without paying a premium, but skip it if you prefer a filter with a textured grip or if you often encounter stuck filters.
- Synthetic media provides good filtration efficiency for standard intervals
- Silicone anti-drain back valve helps maintain oil pressure at startup
- High dirt-holding capacity due to pleated design
Pros: Silicone anti-drain back valve is a plus at this price point; Good overall build quality with metal end caps
Cons: Some Outback owners report the filter can be difficult to remove due to smooth canister surface
5. PurolatorBOSS Oil Filter (PL14615): Heavy Duty
The PurolatorBOSS PL14615 is built for heavy-duty applications. We compared its specs to Subaru’s requirements and found the 350 psi burst strength and silicone components make it one of the most robust filters available. The wire cloth reinforced synthetic media can trap fine particles without restricting flow, even under high pressure. This filter is ideal for Outback owners who tow, drive off-road, or use extended oil change intervals.
However, its premium construction comes at a higher cost, and for most daily drivers, the extra durability is unnecessary. Additionally, some owners report that the filter’s slightly larger diameter can interfere with aftermarket oil cooler lines or skid plates. We recommend the PurolatorBOSS for Outback owners who push their vehicles hard or want maximum protection, but skip it if you have tight engine bay clearance or do not need extreme burst strength.
- Wire cloth reinforced media provides high burst strength and durability
- Silicone anti-drain back valve and gasket resist high temperatures
- Designed for severe service and extended drain intervals
Pros: Extremely high burst strength (350 psi) for demanding conditions; Reinforced media offers excellent dirt-holding capacity
Cons: Higher price and may be overkill for standard driving; Some Outback owners report fitment issues with certain aftermarket oil coolers
6. Fram Ultra Synthetic Oil Filter (XG11060): Long Life
The Fram Ultra Synthetic XG11060 is marketed for extended oil change intervals, and its synthetic media does offer good filtration efficiency. The textured grip is a thoughtful design touch that many DIYers appreciate. Based on our research, the filter meets basic Subaru fitment and has a silicone anti-drain back valve.
However, we have concerns about its durability. Burst strength is not officially published, but independent tests suggest it is around 200 psi, which is below Subaru’s typical requirements. Additionally, some Outback owners have reported the filter canister deforming under high pressure or the gasket failing prematurely. We recommend this filter only for Outback owners who change oil frequently (every 5,000 miles) and want an easy-to-grip filter. Skip it if you drive in severe conditions or plan to use extended drain intervals.
- Synthetic media with high efficiency for extended drain intervals
- Silicone anti-drain back valve for startup protection
- Textured grip surface for easy installation and removal
Pros: Textured canister makes installation and removal easy; Silicone anti-drain back valve is a good feature
Cons: Lower burst strength compared to OEM and premium filters; Inconsistent quality control reported by some users
7. STP Extended Life Oil Filter (S11060XL): Budget
The STP S11060XL is a basic economy filter that we evaluated as a last resort for Outback owners on a tight budget. It uses cellulose media and a nitrile rubber anti-drain back valve. For standard 3,000-5,000 mile oil changes, it may perform adequately. The filter fits the Outback’s thread and gasket correctly.
However, its low burst strength (estimated around 150 psi) is a significant weakness. In cold weather or high RPM operation, the filter could potentially burst or collapse. Also, the cellulose media has lower filtration efficiency (around 80% at 20 microns) compared to synthetic media. We do not recommend this filter for Outback owners who value engine protection or drive in demanding conditions. Skip it entirely if you use synthetic oil or extended drain intervals. This filter is only suitable for those who change oil very frequently and accept minimal filtration.
- Low-cost option for basic oil filtration needs
- Cellulose media adequate for standard oil change intervals
- Anti-drain back valve (nitrile rubber) included
Pros: Very affordable, making frequent changes economical; Simple design with no frills
Cons: Low burst strength may lead to filter failure under stress; Cellulose media has lower efficiency and dirt-holding capacity
Frequently Asked Questions
What is the correct oil filter for a Subaru Outback?
The correct oil filter for most Subaru Outback models (2010 and newer) is the Subaru Genuine Filter (15208AA15A) or any aftermarket filter with M20x1.5 thread, a bypass valve setting around 23 psi, and an anti-drain back valve. Always verify compatibility with your specific model year and engine.
Can I use a Fram filter on my Subaru Outback?
Yes, some Fram filters like the Ultra Synthetic XG11060 are compatible in terms of thread and gasket. However, based on owner feedback and spec comparisons, Fram filters often have lower burst strength than OEM, which may not be ideal for Subaru’s boxer engine. We recommend sticking with OEM or higher-rated aftermarket filters.
How often should I change the oil filter on my Subaru Outback?
Subaru recommends changing the oil filter at every oil change, which is typically every 6,000 miles or 6 months for normal driving, or 3,000-5,000 miles for severe conditions. Using a high-quality filter with synthetic media can support longer intervals, but always follow your owner’s manual.
Is the Mobil 1 M1-110 filter good for Subaru Outback?
Yes, the Mobil 1 M1-110 is a popular aftermarket option that we rated as runner up. It meets Subaru’s thread and pressure specs, and its synthetic media offers excellent filtration. However, its slightly shorter height may cause fitment issues with some aftermarket oil coolers.
What happens if I use the wrong oil filter on my Outback?
Using an incorrect filter can cause oil leaks, insufficient oil pressure, or filter failure. Incorrect thread pitch can damage the engine block, while a wrong bypass valve setting may lead to unfiltered oil circulation. Always use a filter that meets Subaru’s specifications.
Our Verdict
After researching and comparing the top oil filters for the Subaru Outback, our top pick is the Subaru Genuine Oil Filter (15208AA15A) for its perfect fit, reliable silicone anti-drain back valve, and robust burst strength. For a close runner-up that offers excellent filtration and value, the Mobil 1 Extended Performance M1-110 is a strong choice, especially for those using synthetic oil and extended intervals. Choose based on your driving habits and budget.
