Checked oil specs by engine
2021 Audi A4 oil capacity, type & filter
The 2021 Audi A4 takes 5.5 qt of 0W-20 oil.
Applies to checked engine: 2.0L 4-Cyl Turbo. Also check 2021 Audi A4 Quattro .
WIX 51032 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.
2021 Audi A4 oil specs: capacity conditions and filter notes
All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.
With filter means the volume includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Source coverage for the 2021 Audi A4
Supported by AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager).
Supported by AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager).
Supported by AMSOIL Lookup, Purolator Part Finder, RockAuto, and K&N Filters.
6 checked source rows for the 2021 Audi A4.
Before ordering for this 2021 Audi A4
- Capacity
- 5.5 qt (Service fill)
- Oil type
- 0W-20
- Filter
- WIX 51032
Source check: Last checked 2026-06-25 from AMSOIL Lookup, K&N Filters, Purolator Part Finder, RockAuto, Valvoline Product Finder, and Castrol (Olyslager).
Audi A4 oil specs by year
This table includes checked Audi A4 model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2024 | 5.5 qt | 0W-20 | WIX 51032 |
| 2023 | 5.5 qt | 0W-20 | WIX 51032 |
| 2022 | 5.5 qt | 0W-20 | WIX PTL10396 |
| 2021 Current page | 5.5 qt | 0W-20 | WIX 51032 |
| 2020 | 5.5 qt | 0W-20 | WIX 51032 |
| 2019 | 5.5 qt | 0W-30 | PRO-TEC PXL10024 |
| 2018 | 5.5 qt | 5W-40 | WIX 51032 |
| 2017 | 5.5 qt | 5W-40 | WIX 51032 |
| 2016 | 5.5 qt | 5W-40 | AMSOIL EA15K01 |
| 2015 | 4.9 qt | 5W-40 | AMSOIL EA15K01 |
| 2014 | 4.9 qt | 5W-40 | AMSOIL 51831 |
| 2013 | 4.9 qt | 5W-40 | AMSOIL EA15K01 |
| 2012 | 4.9 qt | 5W-40 | AMSOIL EA15K01 |
| 2010 | 4.9 qt | 5W-40 | AMSOIL EA15K01 |
| 2009 | 4.8 qt (multiple engines) | 5W-40 | AMSOIL EA15K05 |
| 2005 | 4.3 qt (multiple engines) | 5W-40 | AMSOIL EA15K01 |
How we verified 2021 Audi A4 oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-25.
This page checked 6 sources for the 2021 Audi A4. 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
- Sources checked
- 6
- Last checked
- 2026-06-25
- Capacity: AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager)
- Oil type: AMSOIL Lookup, Valvoline Product Finder, and Castrol (Olyslager)
- Filter: AMSOIL Lookup, Purolator Part Finder, RockAuto, and K&N Filters
| Source | Supports | Checked | Link |
|---|---|---|---|
| AMSOIL Lookup | Capacity, Oil type, Filter | 2026-06-25 | Visit brand site |
| K&N Filters | Filter | 2026-06-25 | Visit brand site |
| Purolator Part Finder | Filter | 2026-06-25 | Visit brand site |
| RockAuto | Filter | 2026-06-25 | Checked source |
| Valvoline Product Finder | Capacity, Oil type | 2026-06-25 | Checked source |
| Castrol (Olyslager) | Capacity, Oil type | 2026-06-25 | Visit brand site |
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.
Walmart
Compare oil and filter listings for the 2021 Audi A4. Confirm capacity, viscosity, and filter part number before checkout.
Search 2021 Audi A4 oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2021 Audi A4 before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2021 Audi A4 oil & filter →Amazon
Search Amazon listings for the 2021 Audi A4 and check listing fitment notes against the specs above.
Search 2021 Audi A4 oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2021 Audi A4 and verify oil capacity, viscosity, and filter part number before ordering.
Search 2021 Audi A4 oil & filter →Look up another vehicle
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