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Checked oil specs by engine

2009 Audi S8 oil capacity, type & filter

The 2009 Audi S8 takes 10.6 qt of 5W-40 oil.

Applies to checked engine: 5.2L 10-Cyl.

Capacity 10.6 qt i Based on 1 checked source: Castrol (Olyslager). Additional cross-check is still pending: a second checked capacity source and capacity condition (service fill / with filter vs dry fill). Use it as a reference, then confirm the service-fill / with-filter amount before adding oil. See how we verify. Learn how we verify fitment
Oil type 5W-40 i Based on 3 checked sources: AMSOIL Lookup, Pennzoil OATS, 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
A3/B4
Oil Filters Options cross-checked
ECOGARD Shown first X5843 Search X5843 Purolator L35843 Search L35843

ECOGARD X5843 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.

6 sources checked Last checked: 2026-06-26 How we verify →

Where to Buy View Data Sources
Buy oil & filters:
Walmart → AutoZone → Amazon → O'Reilly →
Full synthetic options for 5W-40
Mobil 1 ESP Formula 5W-40 → Castrol Edge 5W-40 → Liqui Moly Top Tec 4200 5W-40 →

Search paths only — confirm your OEM viscosity spec and quantity before checkout.

2009 Audi S8 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 Audi S8

Capacity sources

Supported by Castrol (Olyslager).

Oil type sources

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

Filter sources

Supported by Purolator Part Finder and RockAuto.

Source coverage

6 checked source rows for the 2009 Audi S8.

Before ordering for this 2009 Audi S8

Checkout verification checklist
5.2L 10-Cyl Buy →
Capacity
10.6 qt
Oil type
5W-40
Interval
10,000 mi / 12 mo
Filter
ECOGARD X5843

Source check: Last checked 2026-06-26 from AMSOIL Lookup, Pennzoil OATS, RockAuto, Purolator Part Finder, CarAraC Engine Oil, and Castrol (Olyslager).

Audi S8 oil specs by year

This table includes checked Audi S8 model years available in our database.

Year Capacity Oil type Filter
2022 10 qt 0W-30 PO99500EX
2021 10 qt 0W-30 PO99500EX
2020 10 qt 0W-30 Purolator PL21507
2018 9.2 qt 5W-40 BOSCH 3481
2017 9 qt 5W-40 BOSCH 3481
2016 9.2 qt 5W-40 BOSCH 3481
2009 Current page 10.6 qt 5W-40 ECOGARD X5843
2008 10.6 qt 5W-40 ECOGARD X5843
2007 10.6 qt 5W-40 ECOGARD X5843

How we verified 2009 Audi S8 oil data

How we verify fitment

Checked fitment data. Last checked: 2026-06-26.

This page checked 6 sources for the 2009 Audi S8. 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: 5.2L 10-Cyl capacity and 5.2L 10-Cyl 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
6
Last checked
2026-06-26
Field-level source support
  • Capacity: Castrol (Olyslager)
  • Oil type: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
  • Filter: Purolator Part Finder and RockAuto
  • Change interval: Pennzoil OATS, AMSOIL Lookup, and Castrol (Olyslager)
Source Supports Checked Link
AMSOIL Lookup Oil type 2026-06-26 Visit brand site
Pennzoil OATS Oil type 2026-06-26 Visit brand site
RockAuto Filter 2026-06-26 Checked source
Purolator Part Finder Filter 2026-06-26 Visit brand site
CarAraC Engine Oil Checked 2026-06-26 Checked source
Castrol (Olyslager) Capacity, Oil type 2026-06-26 Visit brand site

2009 Audi S8 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 Audi S8 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 Audi S8?

Castrol's service data indicates a 10,000 mi / 12 mo change interval for the 2009 Audi S8. Always follow your owner's manual and oil-life monitor. Severe service may 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.

2009 Audi S8 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.

Look up another vehicle

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