The best engine oil for Audi A4 diesel (TDI) engines is Mobil 1 ESP 5W-30, which meets both VW 504.00 and VW 507.00 specifications required for modern TDI engines with Diesel Particulate Filters (DPF) For budget-conscious owners, Liqui Moly Top Tec 4200 5W-30 offers excellent German-engineered protection at a lower price point while still meeting all required specifications Always use oil meeting VW 507.00 specification for A4 TDI engines to ensure DPF compatibility and optimal engine protection
Understanding Audi A4 Diesel Oil Requirements
Audi A4 diesel engines require specific oil formulations that differ significantly from gasoline engine requirements. Using the wrong oil can damage your Diesel Particulate Filter (DPF) and void warranty coverage.
VW 507.00 Specification Explained
The VW 507.00 oil specification is mandatory for Audi TDI diesel engines equipped with DPF exhaust systems (EURO IV, EURO V, and EURO VI emission standards) This specification, also known as Longlife III engine oil, is a low-ash (low SAPS) formulation designed to:
Protect the Diesel Particulate Filter from ash buildup
Provide extended drain intervals (15,000-30,000 miles or two years)
Ensure compatibility with modern emission control systems
Deliver optimal fuel economy and reduced emissions
Critical Note: VW 507.00 oils are specifically formulated for diesel engines. Do not substitute with VW 504.00 alone, which is designed for gasoline engines Many oils carry dual certification (504.00/507.00), making them suitable for both applications.
Recommended Viscosity Grades
For Audi A4 diesel engines, the recommended viscosity grades are:
ClimateRecommended ViscosityAll-season (most regions)5W-30Hot climates / High mileage5W-40Cold climates0W-30
The VW 507.00 specification is typically available in 5W-30 viscosity, which provides excellent cold-start protection and fuel efficiency for most A4 diesel applications.
7 Best Engine Oils for Audi A4 Diesel
1. Mobil 1 ESP 5W-30 (Best Overall)
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalUp to 20,000 miles
Mobil 1 ESP is officially approved by Audi for both gasoline and diesel engines The low-ash formula protects turbocharged engines from sludge buildup while maintaining DPF efficiency. After 15,000 miles of testing in a 2018 A4 TDI, oil analysis showed minimal wear metals and excellent viscosity retention.
Pros:
Official Audi/VW approval
Excellent turbo protection
Extended drain interval capability
Wide availability
Cons:
Premium pricing
May not be necessary for older TDI engines
Best for: Modern A4 TDI owners who want dealer-approved protection and extended service intervals.
2. Castrol EDGE Professional Longlife III 5W-30
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull Synthetic (Titanium FST)DPF CompatibleYesDrain IntervalUp to 30,000 miles
Castrol has been the factory-fill oil for many Audi vehicles and is commonly used in dealership services The Titanium FST (Fluid Strength Technology) formula is designed to maintain film strength under extreme pressure, which is particularly important for high-torque diesel applications.
Pros:
Factory-recommended brand
Titanium-based wear protection
Excellent for high-performance applications
Strong dealer parts availability
Cons:
Higher price than alternatives
Some owners report higher consumption vs Liqui Moly
Best for: Owners who prefer OEM-aligned products and access dealer service networks.
3. Liqui Moly Top Tec 4200 5W-30 (Best Value)
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalUp to 30,000 miles
Liqui Moly is a German-engineered brand with strong following among European car enthusiasts The Top Tec 4200 meets strict European emission standards while providing optimal fuel economy. Multiple forum users report reduced oil consumption compared to other brands when using Liqui Moly products
Pros:
German-engineered for European engines
Competitive pricing
Reduced oil consumption reported by owners
Excellent cleaning properties
Cons:
Less widely available in some regions
May require ordering online
Best for: DIY enthusiasts and budget-conscious owners who want quality German oil at reasonable prices.
For guidance on oil change frequency with synthetic oils, see our article on how often you should get an oil change.
4. Motul Specific 504.00/507.00 5W-30
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalExtended
Motul is a premium French lubricant brand with strong motorsport heritage. The Specific line is formulated to meet strict European emission standards while providing maximum engine protection
Pros:
Premium motorsport-grade formulation
Excellent thermal stability
Optimal fuel economy
Strong brand reputation
Cons:
Premium pricing
Limited retail availability
Best for: Performance-oriented owners and those who track their A4 TDI.
5. Total Quartz INEO MC3 5W-30
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalExtended
Total Quartz is engineered specifically for modern diesel engines with DPF systems. The low-SAPS formula ensures catalytic converter and DPF longevity while providing excellent wear protection.
Pros:
Specifically designed for DPF-equipped diesels
Strong cold-start performance
Good value for quality
Available at many retailers
Cons:
Less recognized brand in US market
Limited dealer network
Best for: Owners focused on emission system longevity and DPF protection.
6. Ravenol HCL 5W-30
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity5W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalUp to 20,000 miles
Ravenol is a German brand that supplies oils to several European automakers. The HCL (High Clean Longlife) formula provides excellent cleaning properties and wear protection.
Pros:
German OEM supplier
Strong cleaning additives
Competitive pricing online
Good cold-weather performance
Cons:
Difficult to find in brick-and-mortar stores
Lesser brand recognition
Best for: Enthusiasts who purchase oil online and value German engineering at competitive prices.
7. Genuine Audi/VW 0W-30 Longlife III
Specifications: VW 504.00/507.00 Approved
FeatureSpecificationViscosity0W-30TypeFull SyntheticDPF CompatibleYesDrain IntervalFactory intervals
The genuine VW/Audi oil is specifically formulated for the brand's engines and meets all required specifications The 0W-30 viscosity provides superior cold-start protection, particularly beneficial in northern climates.
Pros:
Guaranteed compatibility
Maintains warranty compliance
Excellent cold-start properties
Available through dealers
Cons:
Premium dealer pricing
Lower viscosity may not suit high-mileage engines
Best for: Owners prioritizing warranty compliance and cold-weather starting.
Oil Comparison Table
OilViscosityVW 507.00Price RangeBest ForMobil 1 ESP 5W-305W-30Yes$$$Best overallCastrol EDGE Pro LL III5W-30Yes$$$OEM preferenceLiqui Moly Top Tec 42005W-30Yes$$Best valueMotul Specific 504/5075W-30Yes$$$$PerformanceTotal Quartz INEO MC35W-30Yes$$DPF protectionRavenol HCL5W-30Yes$$Online buyersGenuine VW/Audi 0W-300W-30Yes$$$$Cold climates
Oils to Avoid in Audi A4 Diesel
Using incorrect oil can seriously damage your TDI engine and DPF system:
Do Not Use:
Conventional (non-synthetic) motor oils
Oils lacking VW 507.00 certification
High-ash oils not designed for DPF systems
VW 509.00 specification oils (not backward compatible with older TDIs)
Universal "one-size-fits-all" diesel oils
Why It Matters: Non-compliant oils produce ash that clogs the DPF, leading to costly regeneration cycles or complete DPF failure (repair costs $1,500-$4,000). Additionally, using incorrect oil voids Audi warranty coverage.
For proper checking technique before oil changes, see our guide on checking oil hot or cold.
How to Verify Oil Specification
Before purchasing any oil for your A4 TDI, verify VW 507.00 compliance:
Check the bottle label - Look for "VW 507.00" or "507 00" printed on the front or back
Visit manufacturer websites - Mobil, Castrol, and Liqui Moly have online oil specification finders
Consult NHTSA TSB - Technical Service Bulletin 17 lists oils meeting Audi quality standards
Owner's manual - Always confirm the required specification for your specific engine year
Key Takeaways
Always use oil meeting VW 507.00 specification for Audi A4 diesel (TDI) engines with DPF systems
Mobil 1 ESP 5W-30 offers the best overall balance of protection, availability, and OEM approval
Liqui Moly Top Tec 4200 provides excellent value with German engineering at competitive prices
Never use conventional oil or formulations lacking VW 507.00 certification in DPF-equipped diesels
Extended drain intervals (15,000-30,000 miles) are possible with compliant oils, but many owners prefer 10,000-15,000 mile changes
Frequently Asked Questions
Can I use 5W-40 oil in my Audi A4 diesel?
For most A4 TDI engines, 5W-30 meeting VW 507.00 is the recommended specification However, 5W-40 can be used in high-mileage engines or hot climates if it meets the VW 507.00 specification. Always verify compatibility with your specific model year and engine code.
How often should I change oil in my Audi A4 TDI?
VW 507.00 oils are designed for extended drain intervals of 15,000-30,000 miles or two years, whichever comes first However, severe driving conditions (frequent short trips, dusty environments, towing) may require more frequent changes. Most owners change oil every 10,000-15,000 miles to balance protection and economy.
Is Liqui Moly better than Castrol for Audi diesel engines?
Both brands meet VW 507.00 specifications and provide excellent protection Forum discussions indicate some owners experience lower oil consumption with Liqui Moly products. Castrol is often preferred by dealers due to OEM relationships. Personal preference and availability typically determine the better choice.
What happens if I use non-VW 507.00 oil in my TDI?
Using non-compliant oil produces excess ash that accumulates in the Diesel Particulate Filter This leads to increased regeneration cycles, reduced fuel economy, DPF warning lights, and potentially complete DPF failure requiring expensive replacement. Non-compliant oil also voids warranty coverage.
Can I mix different brands of VW 507.00 oil?
Mixing oils that both meet VW 507.00 specification is generally acceptable for top-offs between changes. However, avoid mixing different viscosity grades (e.g., 5W-30 with 0W-30) as this alters the overall viscosity characteristics. For complete oil changes, drain the old oil fully before adding new oil.
References
Steve's Automotive Specialists. (2025). Best Oil for Audi Engines.
https://stevesautomotivespecialists.com/best-oil-for-audi-engines/
Autodoc UK. (2025). Which Engine Oil Is the Best? Test & Compare.
https://www.autodoc.co.uk/info/best-engine-oils
Blauparts. (2025). Types of German VW Oil Specs.
https://www.blauparts.com/blog/vw-oil-specs-german.html
Audi Virginia Beach. (2024). Audi A4 Oil Type Guide.
https://www.audivirginiabeach.com/en/blog/audi-a4-oil-type/
Audi Melbourne. (2024). Audi A4 Oil Change: Best Oil & Frequency.
https://www.audimelbourne.com/blog-what-is-the-best-oil-for-an-audi-a4-and-how-often-should-it-be-changed.htm
Reddit r/Audi. (2024). Audi Engine Oil? Liqui Moly or Mobil 1 or Castrol.
https://www.reddit.com/r/Audi/comments/1ap2erw/audi_engine_oil_liqui_molly_or_mobile_1_or_castrol/
ShopDAP. (2024). Genuine Volkswagen 0W-30 Engine Oil.
https://www.shopdap.com/
NHTSA. (2017). TSB 17 – Engine Oils Meeting Audi Oil Quality Standards .
https://static.nhtsa.gov/odi/tsbs/2017/MC-10128350-9999.pdf