Audi Excessive Oil Consumption Guide: Causes, Piston Ring Fixes & Technical Service Bulletins
You’re checking your Audi’s oil level for the third time this month, and that sinking feeling hits—you just topped it off 500 miles ago, and it’s already low again.
If this sounds familiar, you’re not alone. Excessive oil consumption is one of the most talked-about issues in the Audi community, and it affects thousands of owners across multiple models and engine types. The good news? There are fixes, and some might even be covered by extended warranties or settlements.
Here’s the quick TL;DR:
The primary culprit behind Audi oil consumption is stuck piston rings—specifically the oil control rings—that get clogged with carbon deposits over time. This is most common in 2.0 TFSI engines (2009–2017) and some 3.0T models. Audi issued Technical Service Bulletins (TSBs) and a class-action settlement covers certain models up to 9 years/90,000 miles. Fixes range from chemical piston soaks to full engine rebuilds with updated pistons and rings.
Key Takeaways
- Stuck piston rings cause most oil consumption—carbon buildup prevents them from scraping oil properly
- 2.0 TFSI engines (2009–2012) have the most widespread issues, with a known design flaw in the original pistons and rings
- TSB 2027731/7 covers 2009–2011 2.0 TFSI engines—it includes PCV replacement, front crankshaft seal, and ECU software updates
- Class-action settlement (Rieger v. VWGoA) extends coverage to 9 years/90,000 miles for certain 2012–2017 models
- Chemical piston soaks (Berryman B12) have shown significant success for many owners at a fraction of engine rebuild costs
- Oil choice matters—some owners report improvement with Valvoline Restore & Protect or switching to VW 504/507 spec 5W-40
The Root Cause: Why Do Audi Engines Burn Oil?
You pour in a quart of oil, and a few hundred miles later, it’s gone. Where does it all go?
The answer lies in your engine’s piston rings. These metal rings sit in grooves around each piston and perform three critical jobs: sealing the combustion chamber (preventing blow-by), scraping excess oil from cylinder walls, and transferring heat from the piston .
The problem occurs when the oil control rings become stuck in their grooves due to carbon buildup. When this happens, the rings can’t properly scrape oil off the cylinder walls. Instead, the oil stays on the walls, burns during combustion, and exits through the exhaust .
Several factors contribute to this carbon buildup:
- Direct injection design: TFSI engines don’t spray fuel over intake valves, so carbon accumulates on valves and ring lands
- Extended oil change intervals: Audi’s 10,000-mile recommendations may be too long for some driving conditions
- Oil quality: Some “approved” oils may contribute to sludge and ring sticking
- Driving patterns: Short trips, stop-and-go traffic, and extended idling worsen the problem
Which Audi Models Are Affected?
2.0 TFSI EA888 Engines (Most Common)
This is where the problem is most widespread. Audi issued Technical Service Bulletin TSB 2027731/7 for 2009–2011 models with the CAEB engine code :
| Model | Years | Engine Code |
|---|---|---|
| Audi A4 | 2009–2011 | CAEB |
| Audi A5 / A5 Cabriolet | 2010–2011 | CAEB |
| Audi Q5 | 2011 | CAEB |
| Audi A4, A5 (some) | 2011 | CAEB |
The issue continued beyond 2011, however. The class-action settlement covers a broader range:
Models covered by Rieger Settlement:
- 2012–2014 Audi A4, A5, A6, Q5
- 2012–2014 Audi TT (some 2016–2017 as well)
- 2015–2017 Audi A3
3.0T Engines
The 3.0T V6 (CREC engine code, found in Q7 and other models) also suffers from oil consumption due to stuck rings. One Q7 owner reported going from 1 quart every 400 miles to virtually no consumption after a Berryman B12 piston soak and switching to Valvoline Restore & Protect .
Technical Service Bulletins: What Audi Officially Did
TSB 2027731/7 (2.0 TFSI, 2009–2011)
This is the primary TSB addressing excessive oil consumption. It involves a multi-step process :
Step 1: Crankcase Pressure Reduction
- Replace the crankcase pressure regulating valve (PCV) with updated part number 06H103495J
- Replace the front crankshaft seal with part 06L103085B
- Update the Engine Control Module (ECM) software using specific SVM codes for each model
Step 2: Oil Consumption Measurement
- Using Audi’s VAS diagnostic tool, the dealership performs an electronic oil consumption measurement
- The vehicle must be parked on a level surface (tilt must be under 0.5 degrees)
- The customer drives at least 630 miles before the second measurement
Step 3: Repair Authorization
- If oil consumption exceeds spec, Audi’s Technical Assistance Center may authorize piston ring or piston replacement
- This typically requires photos of spark plugs, compression tests, and cylinder leak-down tests
Production Changes
Audi addressed the root cause in production starting with model year 2012 . The updated engines feature:
- Revised pistons with larger 23mm wrist pins (up from 21mm)
- Improved “waffle-style” oil control rings (traditional 3-piece design instead of low-friction U-channel)
- Larger drain-back holes in pistons to prevent clogging
Class-Action Settlement: Rieger v. Volkswagen Group of America
Important: This settlement covers certain vehicles. Here’s what you need to know.
The settlement was approved on May 16, 2024 . It provides extended warranty coverage and reimbursement for past repairs.
What’s Covered?
Warranty Extension (for current owners/lessees) :
- 9 years or 90,000 miles from the vehicle’s in-service date
- 75% coverage of repair costs for excessive oil consumption or fractured pistons
- Sliding scale coverage for engine damage caused by oil consumption:
| Vehicle Age | <50k miles | 50-60k miles | 60-70k miles | 70-90k miles |
|---|---|---|---|---|
| 4 years or less | 100% | 70% | 60% | 50% |
| 4-5 years | 70% | 60% | 50% | 40% |
| 5-6 years | 60% | 50% | 40% | 35% |
| 6-7 years | 50% | 40% | 35% | 30% |
| 7-9 years | 40% | 35% | 30% | 25% |
Past Repair Reimbursement
If you paid for repairs before January 29, 2024:
- 75% reimbursement for one repair of oil consumption or fractured piston
- Must be within 9 years/90,000 miles from in-service date
- Deadline to file claims passed on April 15, 2024
How to Check Coverage
You can check your VIN at the settlement website: pistonsettlement.com . Not every vehicle within these model years is covered—specific VINs apply.
Fix #1: Chemical Piston Soak (Berryman B12)
This is the most talked-about DIY fix in Audi forums, and many owners swear by it.
A Berryman B12 Chemtool piston soak involves removing the spark plugs, pouring the solvent directly into each cylinder, letting it soak for several hours or days, then extracting the liquid and replacing the oil .
Reported results: One Q7 owner reduced consumption from 1 quart every 400 miles to virtually zero after the soak. Another 2009 Avant owner went from 1 liter every 150–300 miles to about 600ml over 1,700 miles .
Key tips from forum experiences :
- Use Valvoline Restore & Protect 5W-30 afterward to prevent rings from re-sticking
- Change oil shortly after the soak (1,000 miles or less)
- Consider shorter oil change intervals (5,000–7,500 miles)
- Replace the PCV valve if it’s original—it can cause oil consumption independent of rings
Fix #2: Updated Pistons and Rings
For severe cases, especially on 2009–2012 2.0 TFSI engines, replacement with updated piston assemblies is the definitive fix.
What’s Involved
The ECS Tuning Oil Consumption Fix Kit includes :
- Updated pistons with larger 23mm wrist pins
- Matching connecting rods (required for the new wrist pin size)
- Full gasket set
- Upgraded rear main seal (billet unit)
- Oil change kit
Part Numbers to Know
| Component | Part Number | Notes |
|---|---|---|
| Piston assembly (updated) | 06H107065DM | Dealer list ~$343 |
| Kolbenschmidt equivalent | 41198600 | ~$140 |
| Ring set (pre-Aug 2013) | 06J198151P | Dealer list ~$308 |
| Ring set (post-Aug 2013) | 06H198151C | Dealer list ~$169 |
Important Design Changes
The updated rings use a traditional 3-piece oil control ring design rather than the original low-friction U-channel rings. The new design provides better oil scraping ability and is less prone to carbon sticking .
Oil Recommendations: Can the Right Oil Help?
Several owners report that switching oil types helped reduce consumption:
VW-Certified Options :
- Mobil 1 ESP 5W-30 (VW 504/507 spec)
- Castrol Euro 5W-40 (VW 502 spec)
Non-Certified but Effective:
- Valvoline Restore & Protect 5W-30—designed specifically to clean piston rings
- Note: This oil has a lower HTHS (3.2) than the Euro spec minimum (3.5), so it may not meet VW’s official approval
Important: Audi recommends VW 504/507 spec oils for modern engines. The official VW specification provides critical high-temperature protection for turbo engines .
Real-World Owner Experiences
“Night and Day Difference”
One Q7 owner with 84,000 miles was burning a quart every 400 miles. After a Berryman B12 piston soak and switching to Valvoline Restore & Protect, the consumption essentially stopped. The owner reported: “Oil consumption has stopped, and I will know in a few more weeks when I reach 2K miles if there is a drop in oil level or I can pull through to 4K miles.”
“Audi Stood Behind It”
A 2009 A4 owner purchased the car out of warranty at 32,000 miles. When he contacted his local dealer, they found the car had previously been serviced for oil consumption. The dealer installed the updated PCV valve free of charge despite the car being out of warranty .
“The Expensive Route”
A 2013 2.0T owner had to replace pistons and rings entirely. An Audi dealer quoted up to $20,000 for the repair on a Q3 out of warranty—leading to a class-action filing in Quebec .
Frequently Asked Questions
1. What is excessive oil consumption for an Audi?
Audi’s official spec considers oil consumption normal up to about 1 quart per 1,000 miles, though many owners and mechanics consider anything over 1 quart per 500 miles problematic. The class-action settlement covers vehicles with diagnosed excessive consumption confirmed by an authorized dealer’s oil consumption test .
2. What causes oil consumption in Audi engines?
The primary cause is stuck piston rings—specifically the oil control rings—that get clogged with carbon deposits. This prevents them from properly scraping oil from cylinder walls, causing oil to burn during combustion .
3. Is my Audi covered under warranty or a recall?
There’s no general recall, but a class-action settlement (Rieger v. VWGoA) covers certain 2012–2017 models up to 9 years/90,000 miles. Check your VIN at pistonsettlement.com . Some owners report Audi covering repairs even out of warranty under “goodwill” .
4. What’s the Berryman B12 piston soak?
It’s a DIY chemical treatment where B12 Chemtool is poured into each cylinder through the spark plug holes and left to soak for hours or days. It dissolves carbon deposits that are sticking the rings. Many owners report significant improvement .
5. Does the 3.0T engine have oil consumption issues?
Yes. The 3.0T (CREC engine) can suffer from the same stuck-ring problem. One Q7 owner reported going from 1 quart per 400 miles to virtually zero consumption after a B12 soak and switching oil .
6. Can switching oil brands fix the problem?
Some owners report success with Valvoline Restore & Protect, which is formulated to clean rings. However, it doesn’t meet VW 504/507 spec. Others stick with VW-approved oils like Mobil 1 ESP 5W-30 and shorten their oil change intervals to 5,000 miles .
7. What should I do if my oil warning light comes on?
Top off the oil immediately with the correct spec. If the light keeps coming on frequently, schedule an oil consumption test at an Audi dealer. Never ignore the oil light—running low on oil can destroy your engine in minutes.
8. How much does it cost to fix oil consumption?
Costs vary dramatically:
- Piston soak (DIY): ~$50–100 for chemicals and oil
- Professional piston soak: $400–800
- PCV valve replacement: $300–700
- Updated pistons and rings (parts only): $1,500–3,000
- Full engine rebuild: $5,000–20,000
References
Trusted Resources for Audi Oil Consumption Information
- Rieger Class Action Settlement Website
- NHTSA – Technical Service Bulletins
- FCP Euro – Audi OEM Parts & Guides
- ECS Tuning – Oil Consumption Fix Kits
Has your Audi struggled with oil consumption? What solution worked for you—piston soak, new rings, or something else? Share your experience in the comments below!