Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If you own a 2015-2019 Subaru Outback, choosing the right oil filter matters for the engine's longevity and performance. The Outback's boxer engine benefits from consistent oil cleanliness and correct filter fitment to maintain oil pressure and protect bearings and turbo components where applicable.This guide covers the top oil filter options for this specific year range and explains the evaluation criteria used to shortlist the best picks. Expect clear guidance on filtration efficiency, compatibility, and service-friendly features so you can pick the right filter before your next oil change.
Looking for other parts? See all Subaru Outback parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Subaru 15208AA20A Engine Oil Filter with Crush Gasket |  |
| Best Quality Built to a higher standard if you want something more solid | BOSCH 3974 Premium Oil Filter with FILTECH Media |  |
| Best Value The sweet spot between price and what you get | Purolator PurolatorBOSS PBL14461 Spin-On Oil Filter |  |
| Best Budget The cheapest option that still gets the job done reliably | Kefly Engine Oil Filter 15208AA160 / 15208AA21A (1 Pack) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Subaru Genuine Engine Oil Filter with Crush Washer (1 Pack) |  |
| Most Popular A crowd favorite that many people choose with confidence | K&N Premium Oil Filter HP-1004 |  |
1. Subaru 15208AA20A Engine Oil Filter with Crush Gasket
| Thread Size | M16 x 1.5 |
|---|---|
| Material | Steel, Cellulose/Synthetic |
| Manufacturer Part Number | 15208AA20A |
| Includes | Filter and crush gasket |
This Subaru oil filter kit provides a direct-fit replacement for select Subaru four-cylinder engines and includes the OEM-style 15208AA20A filter plus the 803916010 crush gasket. It is used during routine oil changes to trap particulate and protect the engine’s oil passages. The filter uses factory-grade media and a machined exterior that fits the vehicle-specific mounting and thread size, making installation straightforward with standard tools. Including the gasket ensures a proper oil pan seal at reassembly and reduces the chance of leaks from using an old seal. Because it is a genuine Subaru part, it matches factory fit and filtration expectations rather than offering aftermarket performance upgrades like higher flow or extended service intervals. Buyers should expect factory-equivalent filtration and fitment with no extra features beyond the OEM specification. This makes it a reliable choice for maintaining factory maintenance standards on compatible Outback models from 2015 to 2019.
Best for: Buyers who want a straightforward, factory-matching oil filter and seal to maintain their Subaru to manufacturer standards without aftermarket variation.
Less Ideal for: Do not choose this if you want extended-interval filters or higher-capacity performance filtration for racing or modified engines.
- Direct-fit genuine Subaru replacement for compatible models
- Includes crush gasket so the oil pan seal is replaced with the filter
- Factory-grade filter media for reliable particulate capture
- Machined exterior and correct thread size for straightforward installation
- Does not offer extended-life or high-performance filtration beyond factory specification
Verdict: Choose this OEM Subaru filter kit if you want guaranteed factory fit and a proper new crush gasket for routine oil changes on a 2015–2019 Outback.
2. BOSCH 3974 Premium Oil Filter with FILTECH Media
| Brand | Bosch |
|---|---|
| Model | 3974 |
| OEM Part Number | F00E164423 |
| Vehicle Service Type | Car |
The Bosch 3974 is a full‑size premium oil filter designed to provide strong particle retention and reliable sealing during routine oil changes on compatible Subaru Outback engines from the target model years. It uses Bosch FILTECH media to capture and hold up to 14 grams of dirt and particles, reducing the risk of abrasive wear circulating through the engine. The filter is built with a metal spiral wound center tube and robust steel base plate to resist warpage and handle higher flow without collapsing. A silicone anti‑drain back valve helps preserve oil in the filter at shutdown for faster lubrication at startup and the high lubricity gasket creates a tight, leak‑proof seal while making later removal easier. For someone focused on performance and engine longevity, this filter gives confidence that filtration and structural integrity are above basic budget options, though it is a vehicle‑specific fit so confirm compatibility with the Outback year and engine before buying.
Best for: Buyers who prioritize engine protection and filtration performance for regular or spirited driving and want a durable, high‑quality replacement filter for their 2015–2019 Subaru Outback.
Less Ideal for: Drivers who prefer the lowest possible purchase cost or those who need a universal or multi‑vehicle filter option should consider other budget or universal models.
- FILTECH media captures and holds up to 14 grams of contaminants for stronger particle retention
- Sturdy steel base plate and spiral‑wound center tube resist warpage and collapse under pressure
- Silicone anti‑drain back valve helps ensure faster oiling at engine start
- High lubricity gasket forms a reliable seal while easing removal during service
- Vehicle‑specific fit required so you must verify correct fit for your Outback engine and trim
Verdict: Choose the Bosch 3974 if you want a robust, high‑filtration replacement that helps protect a 2015–2019 Subaru Outback engine under regular and performance driving.
3. Purolator PurolatorBOSS PBL14461 Spin-On Oil Filter
| Model Number | PBL14461 |
|---|---|
| Thread Size | 20×1.5 MM |
| Material Type | Synthetic, Steel |
| Product Grade | Performance Part |
| Compatible with Vehicle Type | Car, Truck |
The PurolatorBOSS PBL14461 is a spin-on oil filter built around full-synthetic SmartFUSION media to provide high dirt removal and extended service intervals. It is typically used as a direct-replacement filter during scheduled oil changes and is engineered for demanding driving like towing, long commutes, and stop-and-go traffic. Notable features include a silicone anti-drainback valve to prevent dry starts, a reinforced double-helix metal center tube for consistent oil flow under pressure, and a heavy-duty steel casing with an ethylene acrylic PuroSEAL gasket for leak resistance. In practice that means fewer particles circulate through the engine between changes and more reliable lubrication at startup, which helps reduce wear. The filter is offered as a vehicle-specific fit; for a 2015–2019 Subaru Outback you must verify this exact part number fits your engine and model year. Limitations are that claimed long interval performance depends on using the correct oil type and following recommended service intervals, and availability of the exact fitment should be confirmed before purchase.
Best for: A practical buyer who prioritizes longer change intervals and strong particle removal to minimize engine wear on a regularly driven 2015–2019 Subaru Outback.
Less Ideal for: Drivers who prefer to stick strictly to short, frequent oil-change schedules or who cannot confirm exact part fitment for their specific Outback configuration should consider alternatives.
- Full-synthetic SmartFUSION media for high dirt removal and extended service intervals
- Silicone anti-drainback valve reduces wear from dry starts
- Robust internal construction including double-helix center tube for stable oil flow under pressure
- PuroSEAL gasket and steel casing designed to resist leaks and withstand high pressure
- Extended mile claims depend on using the recommended oil type and following the vehicle service schedule
Verdict: Choose this PurolatorBOSS filter if you want a vehicle-specific replacement that emphasizes extended protection and high-efficiency particle capture for a 2015–2019 Subaru Outback.
4. Kefly Engine Oil Filter 15208AA160 / 15208AA21A (1 Pack)
| Thread Size | M16 x 1.5 |
|---|---|
| Product Grade | Replacement Part |
| Compatible with Vehicle Type | Car, Sports Utility Vehicle, Crossover |
| Material Type | Paper, Steel |
| Included Components | Engine Oil Filter 15208AA160 |
This Kefly oil filter is a straightforward replacement designed to match common Subaru 4-cylinder applications. It installs like a standard spin-on filter and is intended for routine oil and filter changes to trap contaminants and protect the engine. The filter lists interchangeability with multiple Subaru part numbers, so it fits the 2015–2019 Outback 4-cylinder models covered by those OEM references. Constructed with paper media and a steel can, the filter offers the familiar filtration performance and durability expected from aftermarket replacements. Practical benefits include one-piece universal fitment for quick swaps and a recommended change interval reminder printed by the manufacturer. Expect reliable filtration for everyday driving and regular maintenance schedules. Limitations are typical of basic replacement filters: it does not advertise high-performance media or extended-life capabilities, and detailed filtration efficiency numbers are not provided, so budget buyers should treat it as a standard maintenance part rather than an upgrade for severe-service or extended-interval oil changes.
Best for: Buyers looking for an affordable, no-frills replacement filter for routine maintenance on Subaru 4-cylinder engines who prioritize cost and easy fitment.
Less Ideal for: Drivers who need high-performance filtration, extended service intervals, or filters specifically rated for severe-duty or motorsport use should consider premium options.
- Interchanges with multiple Subaru factory part numbers for straightforward fitment
- Standard paper media and steel can construction for dependable basic filtration
- Universal spin-on fit simplifies installation during routine oil changes
- No published filtration efficiency or micron ratings and not marketed as extended-life
Verdict: A budget-friendly, factory-equivalent replacement filter that covers 2015–2019 Subaru Outback 4-cylinder models for routine oil change maintenance.
5. Subaru Genuine Engine Oil Filter with Crush Washer (1 Pack)
| Manufacturer Part Number | SOA6351520815 |
|---|---|
| Included Components | Oil Filter and Gasket |
| Thread Size | M16 x 1.5 |
| Compatible with Vehicle Type | Car,Sports Utility Vehicle |
| OEM Equivalent Part Number | 15208AA21A |
This genuine Subaru engine oil filter with crush washer is a direct-fit, vehicle-specific replacement designed to capture microscopic contaminants and protect the engine between oil changes. Intended for routine maintenance, it installs like a factory part and includes the crush gasket needed for a proper drain plug seal. The metal construction and Subaru part numbering mean it matches factory fit and thread size, reducing the chance of leaks or fitment problems that can arise with generic filters. It is typically used whenever you perform an oil service and follows Subaru service interval guidance. The practical benefits are straightforward: reliable fitment, simpler troubleshooting because the part is factory-spec, and the included gasket saves a separate purchase. The main limitation is it is a single-pack OEM replacement, so buyers doing multiple vehicles or stocking up may prefer multi-packs or budget aftermarket options for cost savings.
Best for: Drivers who prioritize reliability and want a factory-spec replacement that matches Subaru fitment and service expectations for routine oil changes.
Less Ideal for: Buyers looking for the lowest-cost bulk option or those who prefer extended-life or high-capacity aftermarket filters designed for extreme-duty use.
- Factory-quality replacement ensures correct fit and thread engagement
- Includes crush washer for proper drain plug sealing during oil changes
- Metal construction designed to trap microscopic contaminants
- Vehicle-specific fit reduces risk of leaks and installation issues
- Sold as a single pack which may be less economical for multiple services
Verdict: Choose this genuine Subaru filter for dependable, factory-matching fit and sealing when servicing 2015–2019 Outback engines.
6. K&N Premium Oil Filter HP-1004
| Thread Size | M20 X 1.5-6H |
|---|---|
| Outside Diameter | 3.16 Inches |
| Material | steel |
| Automotive Fit Type | Vehicle Specific Fit |
The K&N Premium Oil Filter HP-1004 is a robust replacement filter built for extended protection and higher flow rates compared to many standard filters. It uses pleated synthetic-blend media to capture contaminants while maintaining consistent oil flow and a durable steel canister with a welded hex nut for quick wrench-off removal. For routine maintenance on a 2015–2019 Subaru Outback, this filter lets you run longer service intervals when paired with appropriate oil and follows the vehicle fitment guidance. Its construction emphasizes burst strength and durability, which is helpful if you drive in dusty or demanding conditions. The filter is designed to work with synthetic, conventional, and blended oils, so it fits typical service routines. Keep in mind this is a performance-oriented aftermarket part rather than a factory-branded filter, so if you strictly prefer factory-specified consumables you may want to compare manufacturer recommendations before extending drain intervals.
Best for: Drivers who prioritize proven product reputation and want a durable, higher‑flow filter for routine service on a 2015–2019 Subaru Outback while feeling comfortable following community-tested maintenance practices.
Less Ideal for: Drivers who prefer to stick strictly to Subaru factory-branded filters or who will not alter recommended service intervals.
- High flow design helps maintain oil circulation under load and during extended intervals
- Pleated synthetic-blend media captures contaminants effectively
- Heavy‑duty steel canister with welded hex nut simplifies removal
- Compatible with synthetic, conventional, and blended motor oils
- Aftermarket performance part that may encourage longer intervals than manufacturer recommendations
Verdict: A well-regarded, heavy‑duty replacement filter that offers higher flow and easier removal for Subaru Outback owners wanting a durable upgrade backed by strong user feedback.
Choosing the Right 2015-2019 Subaru Outback Oil Filter: Key Factors to Consider
Filtration Efficiency and Media Type
Filtration efficiency determines how well a filter removes particles that cause wear. For the 2015-2019 Outback, choose filters that specify micron ratings or beta ratios so you know what portion of damaging particles will be captured. Media materials range from cellulose to blended fibers and advanced synthetic media; higher-grade media hold more contaminants and maintain lower bypass risk as they load.
The media type also affects flow characteristics and resistance. Synthetic or microglass media typically offer better dirt-holding capacity and lower restriction, which helps maintain stable oil pressure in the boxer engine. When running synthetic oil, select a filter rated for synthetic service to avoid early collapse or bypass under high temperature.
Fitment and Seal Reliability
Correct physical fit is critical for leak-free operation and proper oil flow. For this Subaru Outback range, ensure the filter matches the factory thread size, gasket diameter, and sealing face depth. Improper fit can cause oil pressure loss, leaks at the gasket, or thread damage during installation.
Pay attention to the gasket material and whether the filter includes an anti-drainback valve if the engine layout benefits from one. A high-quality gasket resists swelling and hardening over time and reduces the chance of oil seepage or gasket-related leaks between services.
Bypass Valve and Cold-Start Protection
The bypass valve is a safety feature that allows oil to circulate if the filter becomes clogged or oil is too viscous during cold starts. For the 2015-2019 Outback, dependable bypass performance prevents oil starvation to critical components when the filter is heavily loaded or during very low ambient temperatures.
Review specifications or manufacturer testing on bypass cracking pressure and valve construction. A poorly designed bypass can open prematurely, letting contaminants through, while one that sticks can block flow when needed most. Balanced valve performance protects the engine across normal operating conditions.
Construction Quality and Canister Strength
Robust construction prevents collapse under pressure and protects internal elements from deformation. Look for reinforced end caps, consistent pleat spacing, and reliable seam bonding. For spin-on filters, the shell must resist corrosion and denting while withstanding tightening torque without warping.
Canister strength also contributes to safe handling during installation and removal. Filters with poor construction can leak or fail during service, increasing the risk of oil loss or contamination if the element separates from the end caps.
Serviceability and Installation Features
Ease of installation and predictable removal matter for regular maintenance. Features that improve serviceability include a clear torque recommendation, textured surfaces or flats for a wrench, and an accessible gasket design for replacement. For the Outback, service in tight engine bays is common, so filters that are easy to grip and remove reduce the chance of cross-threading or overtightening.
Also consider whether the filter's anti-drainback design simplifies warm-up behavior and prevents oil pooling during vertical or angled installation positions typical for the Outback's engine layout.
Compatibility With Oil Types and Service Intervals
Different oil formulations and service intervals affect filter selection. If you run full synthetic oil or follow extended drain intervals, choose a filter rated for longer service and compatible with synthetic oil chemistry. Filters with higher dirt-holding capacity and stronger media will better withstand extended intervals without excessive pressure drop.
Check manufacturer recommendations for oil filter maintenance interval compatibility. Matching the filter's intended service life with your planned oil change routine reduces the chance of bypassing or decreased filtration performance as the element loads.
Common Oil Filter Problems to Watch On 2015-2019 Outback
Owners of 2015-2019 Outback models sometimes encounter issues like gasket leaks, improper seating, and premature nuisance bypassing. Many problems trace back to installation errors, incorrect filter selection, or using a filter that does not meet the Outback's thread and gasket specifications.
Regular inspection during oil changes can catch early signs of trouble such as seepage at the gasket, metal shavings on the old filter, or unexpected oil pressure drops. Addressing these symptoms promptly prevents more serious engine wear.
- Check the gasket for tears or missing lubrication before installation
- Use correct torque—hand-tight plus specified turns where recommended
- Inspect old filter for metal or unusual deposits that indicate engine wear
- Replace the gasket or adapter components if they show signs of damage
How Filter Choice Affects Warranty and Maintenance Practices
Choosing a filter that matches OEM fitment and meets or exceeds published filtration specs helps maintain proper service records and can simplify interactions with warranty or service centers. For this Outback range, document filter changes with the filter specification and service mileage.
Using filters rated for synthetic oil when you run synthetic helps avoid confusion over recommended intervals. Keeping a consistent filter type across services makes trend spotting easier when diagnosing oil consumption or filtration-related concerns.
- Record filter type and part spec at each oil change
- Follow the vehicle manufacturer's service interval guidance for oil type
- Keep receipts or notes on filter micron ratings if questioned during warranty service
Installation Tips for a Clean Oil Change
A careful installation reduces the chance of gasket leaks and cross-threading. Before fitting a new filter, clean the mounting surface and remove old gasket remnants. Lightly oil the new gasket with clean engine oil to ensure a good seal and easier removal at the next service.
Tighten the filter to the recommended engagement. Over-tightening can distort the gasket or damage threads, while under-tightening can cause leaks. After the first start post-change, inspect around the filter for drips and recheck torque after a short drive.
- Clean the mating surface thoroughly before fitting the new filter
- Apply a thin film of engine oil to the new gasket
- Start the engine and let it idle, then check for leaks and re-torque if necessary
When To Consider Upgrading Filter Media
If you plan to extend service intervals or operate the Outback in dusty or high-load conditions, upgrading to higher-capacity or synthetic media can be worthwhile. Better media can capture smaller particles and hold more debris between changes, which is beneficial during heavy towing or long highway runs.
However, ensure that any upgrade maintains correct flow characteristics and fits precisely. A higher-efficiency media that increases restriction excessively could impact oil pressure, so choose options that balance filtration gain with acceptable pressure drop.
- Match media upgrades with oil viscosity and service interval changes
- Monitor oil pressure after switching media types for the first few drives
- Prefer media with published micron or beta-ratio specs
Disposal and Environmental Considerations
Used oil filters contain residual oil and trapped contaminants that require responsible disposal. Drain used filters according to local regulations before recycling. Many service centers and recycling facilities accept drained filters and used oil.
Selecting filters with recyclable components or those that are easy to drain can reduce environmental impact. When planning maintenance, factor in how you will store and transport used oil and filters to a recycling facility.
- Drain used filters for the recommended time before sealing them for transport
- Store used oil and filters in approved containers
- Locate local recycling options that accept used automotive filters
Still looking for the perfect fit?
Select your Subaru Outback configuration to see the most relevant Oil Filters recommendations
How We Chose the Best 2015-2019 Subaru Outback Oil Filter
Our selection focused on filters that meet the service needs of 2015-2019 Subaru Outback engines. We prioritized contamination control, verified fit and seal reliability for the Outback's filter housing, and considered factors that affect oil pressure and flow in horizontally opposed engines.Evaluation criteria included filtration media efficiency and micron ratings relevant to modern motor oils, construction quality such as seam strength and anti-drainback features, and gasket and threading tolerances that influence leak-free fitment. We also looked at element capacity and bypass valve performance for heat- and cold-start protection, plus serviceability characteristics like spin-on design and recommended torque.We excluded filters that did not match factory thread and gasket dimensions or lacked specs for synthetic oil service. Filters that failed to provide clear micron or beta-ratio data, or that used questionable construction methods, were not considered. The result is a short list that balances filtration performance, mechanical reliability, and maintenance practicality for the Outback.
Our full evaluation process is outlined in our review methodology.
FAQ
How often should I change the oil filter on a 2015-2019 Subaru Outback?
It often depends on oil type and driving conditions. Many owners change the filter at every oil change, typically every 5,000 to 7,500 miles with conventional oil, or at manufacturer-recommended intervals when using full synthetic. Heavier duty use or dusty conditions may call for more frequent changes.
Can I use a synthetic oil filter with conventional oil in my Outback?
Yes, filters rated for synthetic service are generally compatible with conventional oil. Synthetic media often provides better dirt-holding capacity and filtration. Ensure the filter matches the Outback's fitment specifications regardless of media type.
What causes an oil filter gasket leak and how do I prevent it?
Gasket leaks often result from damaged or misaligned gaskets, debris left on the mating surface, or improper tightening. Prevent leaks by cleaning the mounting face, lightly oiling the new gasket, and tightening to the recommended torque or hand-tight specification.
Is a spin-on oil filter or cartridge-style filter better for the Outback?
It usually depends on the engine configuration and service preference. For 2015-2019 Outback models, use the filter style specified for your engine. Spin-on filters are simple to replace, while cartridge systems allow element-only changes. Choose based on the vehicle's design and your maintenance comfort.
How can I tell if an oil filter is restricting oil flow after installation?
Watch for signs like a drop in oil pressure, unusual engine noise, or dashboard oil pressure warnings. If these occur after a filter change, stop driving and inspect the filter and oil passages. Also check that the bypass valve did not stick and that the correct filter was installed.
Do extended service intervals require a different oil filter?
Usually you should select a filter rated for longer service if you plan extended intervals. Filters with higher dirt-holding capacity and durable media are better suited for extended synthetic oil intervals. Always match the filter's intended service life to your maintenance plan.
Final Verdict
Prioritize correct fitment, reliable seal performance, and filtration efficiency when choosing an oil filter for a 2015-2019 Subaru Outback. Balance media durability with acceptable flow characteristics so the filter protects bearings, turbochargers, and oil passages without causing excessive pressure drop.Focus on filters that document micron or beta-ratio performance, offer robust construction, and match the Outback's gasket and thread specs. That approach helps you pick a durable, service-friendly filter that aligns with your oil type and maintenance interval preferences.
Explore More:
- Check out all Subaru Outback parts & accessories
- Explore Oil Filters Maintenance & Repair Guides
- Explore Engine
- Browse all Auto Parts
