What Kind of Oil a 2019 Audi A6 Quattro Takes

The 2019 Audi A6 Quattro requires fully synthetic engine oil that meets the VW 508 00 / 509 00 specification, most commonly in a 0W-20 viscosity grade; using oil that meets this exact Volkswagen/Audi spec is more important than the brand name on the bottle.

Understanding the Official Oil Specification

For modern Audi engines, the critical factor is compliance with Volkswagen Group’s own oil standards rather than simply choosing a generic synthetic oil. These specifications are engineered around the engine’s design, emissions equipment, and long service intervals.

The main specification for the 2019 Audi A6 Quattro (with the 3.0L turbo V6 or the 2.0L turbo four-cylinder offered in many markets) is VW 508 00 / 509 00. This is a low-viscosity, long-life oil standard designed to work with Audi’s extended maintenance intervals and modern emissions systems.

Key Specification: VW 508 00 / 509 00

VW 508 00 / 509 00 is a combined standard (sometimes written as VW 508.00 / 509.00) that covers gasoline and some diesel engines in the latest-generation Audi/VW lineup. It typically corresponds to a 0W‑20 grade oil, formulated for low friction, fuel efficiency, and compatibility with particulate filters and catalytic converters.

The following list outlines the essential characteristics of oil meeting VW 508 00 / 509 00 and why they matter for a 2019 A6 Quattro engine.

• Viscosity: Almost always 0W‑20, optimized for cold-start protection and efficiency.
• Low-ash formulation: Protects sensitive emissions systems such as GPFs (gasoline particulate filters) and catalytic converters.
• High thermal stability: Withstands the heat of turbocharged engines without breaking down prematurely.
• Extended-drain capability: Designed for Audi’s long service intervals when used under normal conditions.
• OEM approval: Explicitly tested and approved by Volkswagen Group for use in engines like those in the 2019 A6.

Together, these traits ensure that a VW 508 00 / 509 00 oil can deliver both engine protection and fuel economy over the long term, matching Audi’s engineering and service recommendations.

Viscosity Grade: 0W‑20 and Why It Matters

While some older Audi engines used 5W‑30 or 5W‑40, the 2019 A6 Quattro’s newer engines are calibrated around 0W‑20 oil. This low-viscosity oil reduces internal friction, supports higher efficiency, and helps the engine meet stringent emissions and fuel-economy targets.

Why 0W‑20 Is Specified for the 2019 A6 Quattro

The move to 0W‑20 is a deliberate engineering choice rather than a cost-cutting measure. Audi’s tolerances, oil pumps, and control software expect a certain viscosity behavior over temperature.

The list below clarifies why 0W‑20 is standard for this model and why substituting another grade on your own is not advised unless directed by Audi.

• Cold-start performance: 0W rating ensures the oil flows quickly at low temperatures, reducing wear during startup.
• Fuel economy: Thinner oil reduces friction, improving mileage and CO₂ figures.
• Engine calibration: Variable valve timing and other systems are tuned with 0W‑20 viscosity in mind.
• Turbocharger protection: Proper flow characteristics at high temperature help protect bearings and critical components.
• Warranty alignment: Using the factory-recommended grade supports compliance with Audi’s warranty and service expectations.

For owners, this means staying with 0W‑20 that meets VW 508 00 / 509 00 is the safest route unless a dealer or official bulletin recommends something different for a very specific scenario.

Brand Examples That Meet VW 508 00 / 509 00

Many major oil brands now produce products explicitly labeled as meeting VW 508 00 / 509 00. The brand is secondary; what matters is that the exact VW spec appears on the label or in the product’s official approvals list.

The following list offers examples of well-known oils (availability varies by region) often approved for VW 508 00 / 509 00, which you can look for when servicing a 2019 Audi A6 Quattro.

• Castrol EDGE Professional LL IV FE 0W‑20 (often supplied by dealers in some markets)
• Castrol EDGE 0W‑20 LL IV (check label for VW 508 00 / 509 00)
• Mobil 1 ESP X2 0W‑20 (versions explicitly listing VW 508 00 / 509 00 approval)
• Ravenol VSE 0W‑20 (marketed specifically for VW 508 00 / 509 00)
• Liqui Moly Top Tec 6200 0W‑20 (VW 508 00 / 509 00 listed on many regional products)

These examples give a starting point, but you should always confirm the exact VW 508 00 / 509 00 approval on the product label or manufacturer data sheet, since formulations can differ by region and over time.

Checking Your Specific Engine and Market

While VW 508 00 / 509 00 0W‑20 is the dominant recommendation for the 2019 A6 Quattro, it is still important to confirm details for your exact engine variant and market, as some regions and engine codes may have nuanced guidance.

How to Verify the Correct Oil for Your Car

There can be small differences between markets (for example, North America vs. Europe) and between engine types (such as the 2.0 TFSI vs. 3.0 TFSI variants). Verification ensures you are aligned with the exact recommendation for your VIN.

The steps below highlight how owners can double-check the correct oil spec for their particular 2019 A6 Quattro.

1. Consult the owner’s manual: Look for the “Engine oil” section; it will list the primary VW specification and viscosity.
2. Check the under-hood label: Some vehicles have an oil-specification sticker near the oil fill cap or under the hood.
3. Contact an Audi dealer: Provide your VIN and ask for the current factory engine-oil spec and any service bulletins.
4. Use Audi’s official online resources (where available): Some regional Audi sites or digital manuals allow VIN-based lookup.
5. Cross-check oil approvals: When buying oil, confirm that VW 508 00 / 509 00 appears in the official approvals list, not only as “meets requirements.”

By following these steps, you ensure that your oil choice is not just broadly correct for the model year but precisely matched to your specific engine and country requirements.

Service Intervals and Practical Tips

Oil type and oil-change timing go hand in hand. Audi calibrates its flexible or fixed service intervals assuming that the engine is filled with oil meeting the official VW 508 00 / 509 00 spec.

Change Intervals and Owner Best Practices

Many 2019 Audi A6 models are set up for extended intervals under “normal” conditions, but driving style and environment can justify more frequent changes.

The following list outlines practical considerations for oil-change intervals and maintenance habits that help protect the 2019 A6 Quattro’s engine.

• Follow the car’s service indicator: The on-board system calculates when an oil change is due based on time and driving conditions.
• Consider shorter intervals for severe use: Frequent short trips, extreme temperatures, or heavy stop-and-go can justify changing oil sooner than the maximum interval.
• Use a quality filter: Pair approved oil with an OEM or OEM-equivalent oil filter to ensure proper filtration and fit.
• Check oil level regularly: Turbocharged engines can consume small amounts of oil; monitor level between services and top up only with VW 508 00 / 509 00 oil.
• Keep records: Document oil brand, spec, viscosity, and mileage at each change to support warranty and resale value.

Adhering to these practices, in combination with the correct oil specification, greatly reduces the risk of lubrication-related issues and supports the engine’s long-term reliability.

Summary

The 2019 Audi A6 Quattro is designed to run on fully synthetic 0W‑20 engine oil that meets the VW 508 00 / 509 00 specification. This manufacturer standard is more important than any particular brand name and directly supports the engine’s performance, efficiency, emissions compliance, and long service intervals. Owners should confirm the spec in their manual or with a dealer using the vehicle’s VIN, choose an oil that explicitly lists VW 508 00 / 509 00 approval, and follow the vehicle’s service indicator—adjusting intervals if driving in severe conditions. Using the correct oil and maintenance schedule is central to protecting the 2019 A6 Quattro’s engine over the long term.