The right oil for an Audi A4 depends on the engine and year of the car. In most modern A4s, a full-synthetic oil that meets Volkswagen Group specifications such as 504.00/507.00 is recommended; older petrol engines may require 502.00/503.00. Always verify with your owner's manual or dealer to confirm the exact spec for your vehicle.
Oil needs vary across the A4 lineup, which includes multiple petrol and diesel engines introduced over more than a decade. The guidance below explains how to read the specifications, what viscosity ranges are common, and how to select the correct oil for your model year and driving conditions.
Key oil specifications for Audi A4
Understanding the official VW Group oil specifications helps you pick the right product. The two main families you’ll encounter are the older petrol-focused standard and the newer LongLife standards used by many modern engines.
- VW 502.00 (and related 503.00): Common for older petrol engines. Oils here are typically mineral to synthetic blends, with viscosities around 5W-30 or 5W-40, depending on the engine and climate.
- VW 504.00/507.00 (LongLife IV): The current standard for many modern petrol and diesel engines, including newer Audi A4s. These oils support longer drain intervals and are commonly formulated as 0W-30, 0W-40, or 5W-30, depending on the exact engine and climate.
In practice, most contemporary Audi A4 models that use the VW 504.00/507.00 spec will run well on a 0W-30 or 5W-30 full-synthetic oil, while some climates or engines may tolerate 0W-40 or 5W-40. If your car uses the older 502.00/503.00 spec, a 5W-30 or 5W-40 synthetic oil is commonly appropriate. The precise choice should be confirmed in the manual or via a dealer.
Recommended viscosities and how they map to specs
Viscosity is about protecting the engine across temperature ranges while meeting the specification. The following guidance pairs common viscosities with the VW Group specs you’re likely to encounter in an A4.
- 504.00/507.00: 0W-30, 0W-40, or 5W-30 are typical options, chosen based on climate, engine, and maintenance cycle.
- 502.00/503.00: 5W-30 or 5W-40 are common choices for older petrol engines that require these specifications.
Always refer to the exact specification listed in your manual, since some engines may have specific viscosity recommendations even within a given spec.
How to determine the exact oil for your A4 by year
To avoid missteps, follow a simple verification process that applies regardless of the engine:
- Check the owner’s manual or the service label under the fuel filler flap for the exact oil specification (for example, VW 504 00/507 00 or VW 502 00).
- Note your engine code and model year, since the required spec can change across generations (for example, B6/B7/B8 versus the newer B9).
- If you don’t have the manual handy, use an official Audi/VW VIN-based lookup or contact a dealer to confirm the exact spec for your VIN.
- Choose a high-quality full-synthetic oil that explicitly states compatibility with the specified VW Group standard (504.00/507.00 or 502.00/503.00, as applicable).
- Consider climate and driving patterns when selecting viscosity within the allowed range (e.g., colder climates may favor thinner oils like 0W-30 or 0W-20, while hotter climates may use 5W-30 or 5W-40).
Once you have the correct spec and viscosity, stick to it. Using an oil outside the approved specification can affect engine protection, warranty coverage, and maintenance intervals.
Practical tips for buying and changing oil
Because oil specifications are engine-specific, here are practical steps to make a safe choice and a proper change process.
- Use a reputable brand that clearly lists VW 504.00/507.00 or 502.00/503.00 as a compliant specification on the label.
- Ensure the oil is fully synthetic unless the manual specifies otherwise for your engine.
- Replace the oil filter at the same time as the oil change and use a compatible filter for your engine.
- Replace the drain plug washer if your service interval requires it to prevent leaks.
- Do not exceed the recommended drain interval for your engine and driving conditions; use the car’s maintenance schedule as a guide.
- Reset or record the oil service indicator after the change, if applicable.
Following these practices helps maintain engine longevity and keeps your Audi running smoothly.
Bottom line
For most modern Audi A4s, use a full-synthetic oil that meets VW Group specification 504.00/507.00 (LongLife IV) and choose a viscosity recommended by your manual, typically 0W-30 or 5W-30. For older petrol engines, 502.00/503.00 is common, with 5W-30 or 5W-40. Always confirm the exact spec and viscosity from your owner's manual or a dealer, and select a product that clearly states compatibility with the specified VW Group standard.
In short, the oil you need is engine-specific and year-specific. Verify the exact specification, then choose a high-quality synthetic that matches it, and climate should guide your viscosity choice. Oil changes are a small but important maintenance task that protects the heart of your Audi A4.
Summary: The recommended oil for an Audi A4 hinges on the engine and year. Most newer A4s require VW 504.00/507.00 long-life oil, commonly in 0W-30 or 5W-30, while older petrol engines may use VW 502.00/503.00 with similar viscosity options. Always consult the owner's manual or a dealer for the exact spec, and use a full-synthetic oil that explicitly meets the indicated VW Group standard.