What Kind of Oil a 2009 Audi A4 Takes

Your 2009 Audi A4 requires full synthetic engine oil that meets Audi/VW specification VW 502 00 (or VW 504 00 for some long‑life service regimes), typically in viscosity grades such as 5W‑40 or 5W‑30, depending on the engine variant and climate. Using oil that meets these official Volkswagen Group specs is more important than the brand or the exact viscosity, as it directly affects engine longevity, performance, and warranty considerations.

Understanding the Oil Requirements for a 2009 Audi A4

The 2009 Audi A4 sits at a point in Audi’s lineup where turbocharged gasoline engines and modern diesel powertrains became standard, and with them came more demanding lubrication requirements. That is why Audi and its parent company Volkswagen specify not just a weight (like 5W‑40), but a formal performance standard (such as VW 502 00) that the oil must meet. Choosing the correct oil is essential to protect the turbocharger, maintain fuel efficiency, and prevent premature wear or sludge.

The Key Specification: VW 502 00 (and VW 504 00)

While drivers often focus on viscosity labels, Audi’s most important requirement for a 2009 A4 is that the oil meets a particular VW/Audi specification. These standards are tested and certified to cope with the high temperatures and loads typical of turbo engines.

The main Audi/VW oil specs relevant to a 2009 Audi A4 include the following:

• VW 502 00: The primary specification for most gasoline engines of this era, including the 2.0 TFSI in many 2009 A4 models. This is the default requirement for fixed (non–long‑life) service intervals.
• VW 504 00: A higher‑tier spec used in some markets for extended “LongLife” service intervals. It’s a low‑ash, high‑performance oil that’s backward compatible with many 502 00 applications but must not be mixed with incompatible service regimes.
• VW 505 00 / 507 00: Commonly associated with diesel engines (where offered for the A4 in some markets); 507 00 is a low‑SAPS spec designed for engines with diesel particulate filters (DPF).

These specifications signal that the oil has been tested for deposit control, turbo protection, high‑temperature stability, and compatibility with Audi’s emission control systems. If a bottle does not explicitly state VW 502 00 (or the exact spec required for your engine), it should be avoided, even if the viscosity looks correct.

Recommended Viscosity Grades for a 2009 Audi A4

Once the correct VW spec is confirmed, the next factor is viscosity. Audi provides a range of approved viscosities depending on ambient temperature and engine type. For most drivers in moderate climates, a mid‑range viscosity synthetic oil offers the right balance of cold‑start fluidity and hot‑engine protection.

Common viscosity grades that meet Audi’s requirements for a 2009 A4 include:

• 5W‑40 (VW 502 00): Often considered the “default” for the 2.0 TFSI gasoline engines in this era, particularly in North America and Europe. It provides robust protection at high temperature and is widely available.
• 5W‑30 (VW 502 00 or 504 00): Used where fuel economy and long‑life intervals are a priority. Many VW 504 00 oils are 5W‑30 and approved for extended drain intervals in some service regimes and markets.
• 0W‑40 (VW 502 00): Sometimes listed as an alternative, particularly for colder climates, offering better cold‑start performance while still meeting the 502 00 standard.

Choosing between 5W‑30 and 5W‑40 often comes down to your climate, driving style, and local Audi recommendations, but the critical rule is that the oil must also carry the relevant VW/Audi approval.

Gasoline vs. Diesel: Different Needs

The 2009 A4 was sold with various gasoline (petrol) and diesel engines depending on the market. Each type has slightly different lubrication needs and corresponding VW specs. Knowing your exact engine code from the owner’s manual or under‑hood label can help you choose precisely the right oil.

Gasoline Engines (e.g., 2.0 TFSI)

The 2.0‑liter turbocharged four‑cylinder (TFSI) gasoline engine is the most common in the 2009 A4. Turbocharged gasoline motors run hot, shear oil more quickly, and are sensitive to sludge and deposits. This is why Audi insists on high‑quality synthetic oils with solid detergent and anti‑oxidation performance.

For gasoline engines in the 2009 A4, typical guidelines include:

• Specification: VW 502 00 (minimum), or VW 504 00 when specified for long‑life service regimes.
• Oil type: Full synthetic only; conventional or semi‑synthetic oils are not recommended.
• Typical viscosity: 5W‑40 or 5W‑30, depending on climate and service schedule.

Using the correct spec synthetic oil in these turbo engines is especially important to protect the turbocharger bearings and prevent carbon build‑up, which can lead to costly repairs.

Diesel Engines (where applicable)

In markets where the 2009 A4 was offered with TDI diesel engines, the oil requirements are shaped by both the engine design and emissions equipment like diesel particulate filters (DPF). These systems require low‑ash “low‑SAPS” oils to prevent clogging and maintain emissions performance.

For diesel variants, Audi typically recommends:

• Specification: VW 507 00 for DPF‑equipped engines; VW 505 01 or similar for older designs without DPF (depending on market and exact engine).
• Oil type: Full synthetic, low‑SAPS oil, explicitly marked with the VW 507 00 (or specified) approval.
• Typical viscosity: Frequently 5W‑30, though always confirm against the vehicle’s manual.

Because incorrect oil can damage the DPF, diesel owners should be especially strict about matching the VW spec noted in the owner’s literature or under the hood.

How to Confirm the Correct Oil for Your Specific A4

Although broad guidelines cover most 2009 A4s, Audi always defers to the exact engine code, regional emissions standards, and the service setup (fixed vs. long‑life intervals). Verifying your car’s exact requirements will ensure you are not relying only on general advice.

Key ways to double‑check the correct oil for your car include:

• Owner’s manual: The definitive reference. Look for a section listing VW/Audi oil standards (e.g., “Use only oils meeting VW 502 00”). It may also list acceptable viscosity ranges based on climate.
• Service booklet / under‑hood labels: Some cars carry stickers or notes in the engine bay or service booklet specifying oil standard and change intervals.
• VIN‑based dealer lookup: An Audi dealer or authorized service center can pull the exact engine code and service regime from your VIN and confirm the recommended oil spec and viscosity.
• Reputable online catalogues: Major oil brands (Castrol, Mobil, Liqui Moly, Shell, etc.) provide look‑up tools where you enter year, make, model, and engine to see Audi‑approved oils. Always ensure the VW spec is printed on the product’s data sheet or label.

Confirming via at least one official or manufacturer‑backed source ensures that you are not relying on outdated habits or generic “European car” advice that might not meet Audi’s official standards.

Popular Oil Brands and Examples That Meet Audi Specs

Many major oil companies formulate products specifically to meet VW/Audi standards. While no particular brand is mandatory, sticking to known, certified products reduces risk and makes future maintenance more predictable.

Examples of oils commonly used in 2009 Audi A4 models (verify the current label for VW certification) include:

• Castrol Edge 5W‑40 (or 5W‑30) with VW 502 00 approval: Often recommended by Audi dealers in various markets and widely available.
• Mobil 1 FS 0W‑40 (European Car Formula): Frequently carries VW 502 00/505 00 approvals and offers strong high‑temperature stability.
• Liqui Moly Top Tec series (e.g., 4200, 4100, etc.): Several variants are certified to VW 502 00, 504 00, or 507 00; popular among European‑car specialists.
• Shell Helix Ultra / Pennzoil Platinum Euro formula: Certain versions meet VW 502 00 and/or 504 00/507 00, specifically labeled for VW/Audi use.

The crucial step is not the brand itself but ensuring the exact VW spec (502 00, 504 00, 507 00, etc.) is clearly stated on the bottle or in the product data sheet for your chosen oil.

Oil Change Intervals and Maintenance Considerations

Using the correct oil specification goes hand in hand with respecting Audi’s service intervals. Turbocharged engines and high‑performance oils can operate safely over longer distances, but that assumes the oil truly meets the specification and the car’s usage pattern isn’t unusually harsh.

For a 2009 Audi A4, typical maintenance practices include:

• Fixed intervals: Often every 10,000 miles (about 15,000 km) or 1 year, whichever comes first, when using VW 502 00 oil, depending on market guidance.
• LongLife intervals: In regions where VW 504 00/507 00 oils and flexible service regimes are used, intervals can extend (for example, up to 18,000–19,000 miles / 30,000 km in some European schedules), but only when the correct long‑life spec is used and the car’s service computer governs timing.
• Severe service adjustments: For mostly short trips, dusty conditions, extreme heat/cold, or frequent towing, more frequent changes (e.g., 5,000–7,500 miles) are prudent, even with correct spec oil.

Keeping to the right interval with the proper synthetic oil helps maintain the health of the turbocharger, variable valve timing systems, and emission controls, all of which are sensitive to oil quality and cleanliness.

Risks of Using the Wrong Oil

Modern engines are engineered with tight tolerances and sophisticated emission control systems, and the wrong oil can have consequences that are not immediately obvious. Over time, inadequate oil can degrade performance and reliability, and in some cases, lead to expensive repairs.

Potential problems from using oil that does not meet Audi/VW specs include:

• Sludge and deposits: Poor‑quality oil can form carbon and sludge, particularly in hot turbo areas, blocking oil passages and reducing lubrication.
• Turbocharger damage: Turbos rely on a constant flow of high‑quality oil; incorrect spec or degraded oil can cause bearing wear or failure.
• Increased oil consumption: Oils not designed for these engines can volatilize more quickly, leading to more frequent top‑offs and possible fouling of spark plugs or catalytic converters.
• Emission system issues: In diesel engines, using non‑low‑SAPS oil can damage or clog DPFs; in gasoline engines, incorrect additive packages can affect catalytic converters and oxygen sensors.

These risks underline why Audi specifies VW 502 00/504 00/507 00 rather than leaving oil choice entirely to generic “synthetic” labels or basic viscosity numbers.

Practical Checklist Before Your Next Oil Change

Before performing an oil change yourself or authorizing one at a shop, running through a quick checklist can help ensure you are getting the right product for your 2009 A4.

Consider the following steps:

• Confirm your engine and fuel type: Gasoline vs diesel, and exact engine code if possible.
• Check the required VW specification: From the owner’s manual or official resources (likely VW 502 00 for gasoline; VW 507 00 for many diesels).
• Select a suitable viscosity: Typically 5W‑40 or 5W‑30 for most climates; consult the manual’s temperature chart.
• Verify the label: Make sure the bottle clearly lists the required VW spec among its approvals.
• Use a quality filter: Choose an OEM or high‑quality aftermarket filter designed for your engine to match the oil’s performance.

Following such a checklist can help you avoid misfills, ensure long‑term reliability, and give you confidence that your A4’s engine is properly protected.

Summary

A 2009 Audi A4 generally requires full synthetic engine oil that meets Audi/VW’s official specifications—primarily VW 502 00 for most gasoline engines and VW 507 00 for many diesel variants (or VW 504 00/507 00 where long‑life service regimes apply). Common suitable viscosities are 5W‑40 or 5W‑30, chosen according to climate and service schedule. Above all, the VW specification printed on the oil container is more critical than brand or exact weight. By matching that spec, checking your owner’s manual, and adhering to appropriate change intervals, you ensure your 2009 A4’s engine and turbocharger receive the protection they were designed to have.

Does Audi require full synthetic oil?

Both Audi and Volkswagen require full synthetic oil for all models. Unlike conventional oil, synthetic oil is engineered to: Withstand higher temperatures without breaking down, flow more efficiently in cold weather, resist oxidation, and provide better lubrication and protection for longer intervals.

Is Dot 4 for an Audi A4 2015?

StopTech DOT 4 Racing Brake Fluid is available in two formulations depending on the operating temperature of your vehicle: STR600 and STR660. It is engineered to give street and strip vehicles the best in braking performance.

What kind of oil does a 2009 Audi A4 take?

Notes: Full synthetic. 5W-40. 1 quart.

What oil is best for an Audi A4?

Choosing the Best Oil for Your Audi A4
Audi recommends using synthetic oil that meets the VW 502 00 specification. Here are a few top choices: Castrol EDGE 5W-30 Full Synthetic Motor Oil: Known for its exceptional strength under high pressure, this oil provides superior protection and performance for your Audi A4.