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Checked oil specs by engine

2009 Subaru Legacy oil capacity, type & filter

Multiple engine options are listed for the 2009 Subaru Legacy. Select your engine below before buying oil or a filter.

2009 Subaru Legacy oil specs by engine
Engine Capacity Oil Type Filter
2.5L 4-Cyl Turbo 4.2 qt 30 AMSOIL EA15K12
3.0L 6-Cyl 5.8 qt — AMSOIL EA15K20

Match one of 2 checked engine options before buying oil or a filter.

2.5L 4-Cyl Turbo
Capacity 4.2 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 5 qt total; listed capacity is 4.2 qt.
Oil type 30 i Based on 1 checked source: AMSOIL Lookup. Additional cross-check is still pending: a second checked oil-type source and agreement across all checked oil-type sources. Use it as a reference, then confirm the viscosity grade for this engine before checkout. See how we verify. Learn how we verify fitment OEM oil approval is not source-backed on this page; confirm the bottle or owner's manual before checkout.
Oil Filters Options cross-checked
AMSOIL Shown first EA15K12 Search EA15K12 AMSOIL EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 AMSOIL EA15K03 Search EA15K03 CHAMP / LUBER-FINER PH2876 Search PH2876 Purolator L14615 Search L14615

AMSOIL EA15K12 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

3.0L 6-Cyl
Capacity 5.8 qt i Capacity condition is not listed in the checked data, so confirm whether the service-fill amount includes a new filter before adding oil. See how we verify. Learn how we verify fitment Verified fit Buy at least 6 qt total; listed capacity is 5.8 qt.
Oil type Not confirmed Confirm the viscosity grade for this engine before checkout.
Oil Filters Options cross-checked
AMSOIL Shown first EA15K20 Search EA15K20 WIX 51334 Search 51334 AMSOIL EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 PRO-TEC PXL51334 Search PXL51334 Purolator L14459 Search L14459

AMSOIL EA15K20 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

5 sources checked Last checked: 2026-06-24 How we verify →

Where to Buy View Data Sources
Buy oil & filters:
Walmart → AutoZone → Amazon → O'Reilly →

2009 Subaru Legacy oil specs: capacity conditions and filter notes

Which engine applies?

Check the door jamb sticker, owner's manual, or displacement badge on the engine cover. Match it to the engine options listed above before buying oil or a filter.

Filter part numbers

All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.

Verify before checkout

Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.

Source coverage for the 2009 Subaru Legacy

Capacity sources

Supported by Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager).

Oil type sources

Supported by AMSOIL Lookup.

Filter sources

Supported by RockAuto, Purolator Part Finder, and AMSOIL Lookup.

Source coverage

5 checked source rows for the 2009 Subaru Legacy.

Before ordering for this 2009 Subaru Legacy

Checkout verification checklist
2.5L 4-Cyl Turbo Buy →
Capacity
4.2 qt
Oil type
30
Interval
3,750 mi / 4 mo
Filter
AMSOIL EA15K12
3.0L 6-Cyl Buy →
Capacity
5.8 qt
Oil type
Unverified
Interval
3,750 mi / 4 mo
Filter
AMSOIL EA15K20

Source check: Last checked 2026-06-24 from AMSOIL Lookup, Pennzoil OATS, RockAuto, Purolator Part Finder, and Castrol (Olyslager).

Same oil specs on other 2009 Subaru models

Outback

Subaru Legacy oil specs by year

This table includes checked Subaru Legacy model years available in our database.

Year Capacity Oil type Filter
2025 4.8 qt (multiple engines) 0W-20 AMSOIL EA15K13
2024 4.8 qt (multiple engines) 0W-20 Purolator L14615
2023 4.8 qt (multiple engines) 0W-20 PRO-TEC PXL57055
2022 4.8 qt (multiple engines) 0W-20 PRO-TEC PXL57055
2021 4.8 qt (multiple engines) 0W-20 AMSOIL EA15K13
2020 4.8 qt (multiple engines) 0W-20 AMSOIL EA15K13
2019 5.1 qt (multiple engines) 0W-20 AMSOIL EA15K13
2018 5.1 qt (multiple engines) 0W-20 AMSOIL EA15K13
2017 5.1 qt (multiple engines) 0W-20 CHAMP / LUBER-FINER PH2867
2016 5.1 qt (multiple engines) 0W-20 Purolator L14615
2015 5.1 qt (multiple engines) 0W-20 AMSOIL EA15K13
2014 4.5 qt (multiple engines) 0W-20 AMSOIL EA15K13
2013 5.1 qt (multiple engines) 0W-20 AMSOIL EA15K13
2012 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K12
2011 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K12
2010 4.5 qt (multiple engines) 5W-30 AMSOIL EA15K12
2009 Current page 4.2 qt (multiple engines) 30 AMSOIL EA15K12
2008 4.4 qt (multiple engines) 5W-30 AMSOIL EA15K12
2007 4.4 qt (multiple engines) 10W-30 AMSOIL EA15K12
2005 4.2 qt (multiple engines) 5W-30 AMSOIL EA15K12

How we verified 2009 Subaru Legacy oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-24.

This page checked 5 sources for the 2009 Subaru Legacy. The table lists which checked source contributed capacity, oil type, or filter evidence.

We checked leading oil brands and aftermarket filter catalogs so you don't have to.

Confidence
Cross-check pending i Some oil fields are based on checked source data but still need stronger cross-check evidence. Review area: 2.5L 4-Cyl Turbo oil type. Use the listed values as references and confirm the exact engine before ordering or adding oil. See how we verify. Learn how we verify fitment
Sources checked
5
Last checked
2026-06-24
Field-level source support
  • Capacity: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
  • Oil type: AMSOIL Lookup
  • Filter: RockAuto, Purolator Part Finder, and AMSOIL Lookup
  • Change interval: AMSOIL Lookup
Source Supports Checked Link
AMSOIL Lookup Capacity, Oil type, Filter 2026-06-24 Visit brand site
Pennzoil OATS Capacity 2026-06-24 Visit brand site
RockAuto Filter 2026-06-24 Checked source
Purolator Part Finder Filter 2026-06-24 Visit brand site
Castrol (Olyslager) Capacity 2026-06-24 Visit brand site

2009 Subaru Legacy maintenance checklist

One part checked. Look up the rest while you're here.

Where to buy

These are retailer search paths for your vehicle. The specs above are checked — use the retailer's vehicle selector at checkout to confirm before ordering.

This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.

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