Complete Oil Specifications
Your 2021 Audi A4 2.0T requires 0W-20 fully synthetic engine oil. Crucially, the oil must meet the exacting VW 508 00 specification. (Note: Many non-US markets or different variants of the EA888 engine may instead specify 5W-30 meeting VW 504 00; always verify the oil spec sticker under your hood).
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| OEM Standard | VW 508 00 / ACEA C5 |
| Capacity (with filter) | 5.5 quarts |
| Oil Filter | Audi 06L115562B |
| Normal Interval | 10000 miles |
Why VW 508 00 is Critical for This Engine
The B9.5 generation A4 2.0T employs an advanced B-cycle (Budack cycle) combustion process to rapidly heat the catalytic converter and manage turbocharger operation efficiently. The extreme low-viscosity 0W-20 paired with the very particular additive package found only in VW 508 00 oils is mandatory for these tight tolerances.
Using incorrect oil will:
- ❌ Void your factory powertrain warranty
- ❌ Provide insufficient film strength for the timing chain
- ❌ Lead to rapid sludge buildup and potential oil burning
Audi/VW-Approved Oil Brands
-
✅ Castrol EDGE Professional LL IV FE 0W-20
-
✅ Mobil 1 ESP x2 0W-20
-
✅ Liqui Moly Top Tec 6200 SAE 0W-20
-
✅ Motul Specific 508 00 509 00 0W-20
-
✅ Ravenol VSE 0W-20
Never substitute standard API SP or ILSAC GF-6A 0W-20 oils unless they specifically state compliance with VW 508 00 on the bottle.
Severe Service Check
You need the 5000-mile interval if you:
- Deal with extensive stop-and-go commuting
- Drive only a few miles at a time where the oil never reaches full operating temp (190°F+)
- Race or significantly tune your vehicle (Stage 1/2)
- Drive in sub-zero winter regions or highly dusty environments
Installation Details
Drain Plug Torque: 22 ft-lbs
Oil Filter Housing Cap Torque: 18 ft-lbs / 25 Nm
OEM Filter: Audi 06L115562B
Aftermarket Filters:
-
MANN-FILTER HU 6013 z
-
Hengst E125H D340
-
Mahle OX 1083D
Pro Tip: Your Audi uses an integrated plastic oil filter housing. Use exactly a 32mm socket and a torque wrench to tighten the cap to 25 Nm to prevent cracking the housing, which requires a costly replacement.
FAQs
What oil does a 2021 Audi A4 2.0T take?
0W-20 full synthetic engine oil explicitly meeting the VW 508 00 / Porsche C20 standard.
How many quarts does it need?
5.5 quarts (5.2 Liters) with an oil and filter change.
Can I use 5W-30 instead?
In the US/Canadian market 2021 B-cycle engines, Audi strictly mandates 0W-20. Older generations or different global markets permitted 5W-40 or 5W-30. Look under your hood for the specific sticker.
Is synthetic oil required?
Yes, only highly refined, full synthetic base stocks can pass the grueling VW 508 00 testing protocols.
How often should I change the oil?
Annually or every 10000 miles. For heavy city driving or tuned cars, halve it to 5000 miles.
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-02-25 | Source: 2021 Audi A4 Owner’s Manual and VW Service Docs