Checked oil specs by engine
2018 Audi S6 oil capacity, type & filter
The 2018 Audi S6 takes 8.8 qt of 5W-40 oil. Supported by 5 checked sources.
Applies to checked engine: 4.0L 8-Cyl Turbo.
BOSCH 3481 is copied into the checkout checklist as the first source-backed candidate for the 4.0L 8-Cyl Turbo. 1 other candidate number is kept for cross-checking; confirm the exact filter in the retailer selector before buying.
Same oil capacity and viscosity as the 2014, 2016, 2017 model years in checked records.
Viscosity changed at this generation: this 2018 Audi S6 uses 5W-40. Checked records show 2020–2025 uses 0W-30. Confirm before purchasing oil.
Same oil specs also checked for the 2018 Audi S7.
Search paths only — confirm the bottle matches your viscosity, API/OEM approval requirements, and purchase quantity before checkout.
2018 Audi S6 oil specs: capacity conditions and filter notes
The filter part numbers listed above come from checked source rows for this vehicle and engine. Use them as candidates, then confirm the exact part number at checkout; do not substitute across engine rows.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Quick reference for this 2018 Audi S6
- Capacity
- 8.8 qt
- Oil type
- 5W-40
- Interval
- 10,000 mi / 12 mo
- Filter
- BOSCH 3481
Source check: Last checked 2026-06-23 from Pennzoil oil application database, AMSOIL fitment lookup, RockAuto parts catalog, Purolator fitment catalog, and Castrol fitment database.
Checked oil rows for the 2018 Audi S6 share the listed capacity, viscosity, and filter pattern with 2018 Audi S7. This page remains keyed to the exact S6 row; confirm that model in the seller selector before buying oil or a filter.
Audi S6 oil specs by year
The 2018 page is the seventh-newest S6 oil record. Oil specs changed in the 2020 model year — confirm you are on the correct year before buying oil or a filter.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2025 | 8 qt | 0W-30 | AMSOIL 51458350 |
| 2024 | 8 qt | 0W-30 | PO99500EX |
| 2023 | 8 qt | 0W-30 | PO99500EX |
| 2022 | 8 qt | 0W-30 | PO99500EX |
| 2021 | 8 qt | 0W-30 | PO99500EX |
| 2020 | 8 qt | 0W-30 | PO99500EX |
| 2018 Current page | 8.8 qt | 5W-40 | BOSCH 3481 |
| 2017 | 8.8 qt | 5W-40 | BOSCH 3481 |
| 2016 | 8.8 qt | 5W-40 | AMSOIL EA5q3XH |
| 2015 | 9.2 qt | 5W-40 | BOSCH 3481 |
| 2014 | 8.8 qt | 5W-40 | BOSCH 3481 |
| 2013 | 8.8 qt | 5W-40 | BOSCH 3481 |
| 2012 | 8.8 qt | 5W-40 | Unverified |
| 2011 | 10.6 qt | 5W-40 | PRO-TEC PXL57330 |
| 2010 | 10.6 qt | 5W-40 | ULTRA-POWER 57204 |
| 2009 | 10.6 qt | 5W-40 | PRO-TEC PXL57330 |
| 2008 | 10.6 qt | 5W-40 | PRO-TEC PXL57330 |
| 2007 | 10.6 qt | 5W-40 | PRO-TEC PXL57330 |
How we verified 2018 Audi S6 oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-23.
This page checked 5 sources for the 2018 Audi S6. Capacity: Pennzoil oil application database; oil type: AMSOIL fitment lookup and Castrol fitment database; filter: Purolator fitment catalog and RockAuto parts catalog.
- Confidence
- Cross-check pending
- Sources checked
- 5
- Last checked
- 2026-06-23
- Capacity: Pennzoil oil application database
- Oil type: AMSOIL fitment lookup and Castrol fitment database
- OEM oil spec: Not source-backed on this page
- Filter: Purolator fitment catalog and RockAuto parts catalog
- Change interval: Castrol fitment database
| Source | Supports | Checked | Link |
|---|---|---|---|
| Pennzoil oil application database | Capacity | 2026-06-23 | Visit brand site |
| AMSOIL fitment lookup | Oil type | 2026-06-23 | Visit brand site |
| RockAuto parts catalog | Filter | 2026-06-23 | Checked source |
| Purolator fitment catalog | Filter | 2026-06-23 | Visit brand site |
| Castrol fitment database | Oil type, Change interval | 2026-06-23 | Visit brand site |
2018 Audi S6 oil — questions before buying
- Can I use 10W-40 instead of 5W-40 in my 2018 Audi S6?
- The checked source rows on this page list 5W-40 for the 2018 Audi S6. Use 5W-40 unless your owner's manual, oil cap, or service information for your exact engine allows another grade. If a retailer suggests 10W-40, match the engine row first and confirm the grade before buying.
- Did the Audi S6 change its recommended oil viscosity across model years?
- Yes. Checked records show the Audi S6 has specified more than one viscosity grade across model years. 2007–2018: 5W-40; 2020–2025: 0W-30. Confirm the viscosity shown on this page matches your exact year before buying oil.
2018 Audi S6 maintenance checklist
One part checked. Look up the rest while you're here.
- Cabin air filter 2018 Audi S6 cabin filter part numbers
- Engine air filter 2018 Audi S6 engine filter part numbers
- Wiper blade size 2018 Audi S6 driver & passenger blade sizes
- Oil type & capacity 5W-40 · 8.8 qt Checked
Where to buy
These are retailer search paths for listed specs on this page. Use the retailer's vehicle selector at checkout to confirm before ordering.
This section may include affiliate or sponsored retailer links. They are search paths, not fitment evidence.
Walmart
Search Walmart for 2018 Audi S6 oil and filter, then match the listing specs against the capacity and viscosity shown above before adding to cart.
Search 2018 Audi S6 oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2018 Audi S6 to confirm oil capacity, viscosity, and filter fitment before checkout.
Search 2018 Audi S6 oil & filter →Amazon
Search Amazon for the 2018 Audi S6 oil and filter and verify the listing's engine fit note matches your engine before ordering.
Search 2018 Audi S6 oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2018 Audi S6 oil and filter and cross-check capacity, viscosity, and filter part number against the specs above.
Search 2018 Audi S6 oil & filter →Look up another vehicle
Find checked oil capacity, type, and filter data by exact year, make, and model.