Checked oil specs by engine
2021 Audi A8 Quattro oil capacity, type & filter
The 2021 Audi A8 Quattro takes 10 qt of 0W-30 (4.0L 8-Cyl Turbo) and 7.6 qt of 0W-20 (3.0L 6-Cyl Turbo). Select your engine below before buying.
| Engine | Capacity | Oil Type | Filter |
|---|---|---|---|
| 4.0L 8-Cyl Turbo | 10 qt | 0W-30 | — |
| 3.0L 6-Cyl Turbo | 7.6 qt | 0W-20 | AMSOIL 51456057 |
Match one of 2 checked engine options before buying oil or a filter.
Confirm AMSOIL 51456057 in the retailer selector before checkout.
Search paths only — confirm your OEM viscosity spec and quantity before checkout.
2021 Audi A8 Quattro oil specs: capacity conditions and filter notes
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 fitment has not been fully verified for every engine listed. Confirm the part number with the retailer before ordering.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Source coverage for the 2021 Audi A8 Quattro
Supported by Pennzoil OATS and AMSOIL Lookup.
Supported by Pennzoil OATS and AMSOIL Lookup.
Supported by AMSOIL Lookup.
2 checked source rows for the 2021 Audi A8 Quattro.
Before ordering for this 2021 Audi A8 Quattro
Audi A8 Quattro oil specs by year
This table includes checked Audi A8 Quattro model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2025 | 8 qt | 0W-20 | AMSOIL 51458345 |
| 2024 | 8 qt | 0W-20 | AMSOIL 51455800 |
| 2023 | 8 qt | 0W-20 | Unverified |
| 2022 | 8 qt | 0W-20 | Unverified |
| 2021 Current page | 10 qt (multiple engines) | 0W-30 | Unverified |
| 2020 | 10 qt (multiple engines) | 0W-30 | Unverified |
| 2019 | 10 qt (multiple engines) | 0W-30 | Purolator PL21507 |
| 2018 | 9.5 qt (multiple engines) | 5W-40 | Unverified |
| 2014 | 7.2 qt (multiple engines) | 5W-30 | WIX 51387 |
How we verified 2021 Audi A8 Quattro oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-27.
This page checked 2 sources for the 2021 Audi A8 Quattro. 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
- 2
- Last checked
- 2026-06-27
- Capacity: Pennzoil OATS and AMSOIL Lookup
- Oil type: Pennzoil OATS and AMSOIL Lookup
- Filter: AMSOIL Lookup
| Source | Supports | Checked | Link |
|---|---|---|---|
| AMSOIL Lookup | Capacity, Oil type, Filter | 2026-06-27 | Visit brand site |
| Pennzoil OATS | Capacity, Oil type | 2026-06-27 | Visit brand site |
2021 Audi A8 Quattro oil FAQ
Which engine configuration applies to my vehicle?
Use the door jamb sticker, owner's manual, or engine cover badge to identify your engine, then match it to the engine options listed above.
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 2021 Audi A8 Quattro 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 2021 Audi A8 Quattro?
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.
2021 Audi A8 Quattro 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.
Walmart
Compare oil and filter listings for the 2021 Audi A8 Quattro. Confirm capacity, viscosity, and filter part number before checkout.
Search 2021 Audi A8 Quattro oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2021 Audi A8 Quattro before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2021 Audi A8 Quattro oil & filter →Amazon
Search Amazon listings for the 2021 Audi A8 Quattro and check listing fitment notes against the specs above.
Search 2021 Audi A8 Quattro oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2021 Audi A8 Quattro and verify oil capacity, viscosity, and filter part number before ordering.
Search 2021 Audi A8 Quattro oil & filter →Look up another vehicle
Find checked oil capacity, type, and filter data by exact year, make, and model.