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2009 Mazda CX-9 oil capacity, type & filter

The 2009 Mazda CX-9 takes 5.5 qt of 0W-20 oil.

Applies to checked engine: 3.7L V6.

Capacity 5.5 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 5.5 qt.
Oil type 0W-20 i Based on 2 checked sources: Valvoline Product Finder and Castrol (Olyslager). Additional cross-check is still pending: 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
WIX Shown first 51516 Search 51516 AMSOIL EA15K01 Search EA15K01 AMSOIL EA15K02 Search EA15K02 AMSOIL EA15K03 Search EA15K03 CHAMP / LUBER-FINER PH400 Search PH400 Purolator L20195 Search L20195 K&N HP-2009 Search HP-2009

WIX 51516 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

7 sources checkedLast checked: 2026-06-25How we verify →

Where to Buy View Data Sources
Buy oil & filters:
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2009 Mazda CX-9 oil specs: capacity conditions and filter notes

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 Mazda CX-9

Capacity sources

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

Oil type sources

Supported by Valvoline Product Finder and Castrol (Olyslager).

Filter sources

Supported by AMSOIL Lookup, RockAuto, Purolator Part Finder, and K&N Filters.

Source coverage

7 checked source rows for the 2009 Mazda CX-9.

Before ordering for this 2009 Mazda CX-9

Checkout verification checklist
3.7L V6
Capacity
5.5 qt
Oil type
0W-20
Filter
WIX 51516

Source check: Last checked 2026-06-25 from AMSOIL Lookup, K&N Filters, Pennzoil OATS, RockAuto, Purolator Part Finder, Valvoline Product Finder, and Castrol (Olyslager).

Mazda CX-9 oil specs by year

This table includes checked Mazda CX-9 model years available in our database.

Year Capacity Oil type Filter
2009 Current page 5.5 qt 0W-20 WIX 51516
2008 5.5 qt 0W-20 WIX 51516
2007 5.5 qt (multiple engines) 0W-20 WIX 51516

How we verified 2009 Mazda CX-9 oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-25.

This page checked 7 sources for the 2009 Mazda CX-9. 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: 3.7L V6 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
7
Last checked
2026-06-25
Field-level source support
  • Capacity: AMSOIL Lookup, Pennzoil OATS, Valvoline Product Finder, and Castrol (Olyslager)
  • Oil type: Valvoline Product Finder and Castrol (Olyslager)
  • Filter: AMSOIL Lookup, RockAuto, Purolator Part Finder, and K&N Filters
Source Supports Checked Link
AMSOIL Lookup Capacity, Filter 2026-06-25 Visit brand site
K&N Filters Filter 2026-06-25 Visit brand site
Pennzoil OATS Capacity 2026-06-25 Visit brand site
RockAuto Filter 2026-06-25 Checked source
Purolator Part Finder Filter 2026-06-25 Visit brand site
Valvoline Product Finder Capacity, Oil type 2026-06-25 Checked source
Castrol (Olyslager) Capacity, Oil type 2026-06-25 Visit brand site

2009 Mazda CX-9 oil FAQ

Is the oil capacity measured with or without the filter?

Capacity condition matters. With filter includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.

Why should I confirm before buying?

Retailer catalogs can update separately. Confirm the exact 2009 Mazda CX-9 selector at checkout before you buy.

Do I also need to match the OEM oil approval?

Yes. Viscosity is only one part of the oil spec. Match the oil approval listed in your owner's manual or on the bottle before checkout.

How often should I change the oil on a 2009 Mazda CX-9?

Use the oil-life monitor or the interval in your owner's manual for this engine. Severe service can require a shorter interval.

Do I need a new drain plug gasket?

Replace it when your vehicle uses a serviceable gasket or crush washer. Confirm the gasket size and drain plug torque from the service manual or parts counter.

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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