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Excessive Oil Consumption on my 2016 Audi A6 2.0T

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Mike T. · rep 0 · May 26, 3:45 AM · 1 replies · solved · Question

Vehicle: 2016 Audi A6 2.0T Premium

Hi everyone, I'm reaching out because I'm concerned about the oil consumption in my 2016 Audi A6 2.0T Premium. I've had the car for a couple of years, and lately, it seems like I'm adding a quart of oil every 1,500 to 2,000 miles. There are no visible leaks that I can find, and no smoke from the exhaust.

I know some oil consumption is normal for these engines, but this feels excessive. My oil changes are done regularly. Is this a common issue for the 2.0T engines in the A6, and what could be the underlying cause? Should I be worried about engine damage?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:45 AM

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ClearTheCode admin answer:

Excessive oil consumption in the 2.0T engines (specifically the EA888 Gen 2 and Gen 3) is a well-documented issue for some Audi and VW models, including your 2016 A6. While some oil consumption is considered normal for turbocharged engines, adding a quart every 1,500-2,000 miles is indeed on the higher side and warrants investigation.

Common Causes for Excessive Oil Consumption (2.0T EA888):

  1. PCV Valve Failure: A faulty PCV (Positive Crankcase Ventilation) valve is a very common cause. When the PCV valve fails, it can lead to excessive crankcase pressure, forcing oil past the piston rings or valve stem seals, or allowing oil to be drawn into the intake manifold.
  2. Piston Rings: In earlier iterations of the EA888 engine (Gen 2, primarily 2009-2012 models), poorly designed piston rings were a significant cause of oil consumption. While your 2016 A6 (likely Gen 3) has improved rings, wear and tear can still occur.
  3. Turbocharger Seals: Leaking seals within the turbocharger can allow oil to enter the intake or exhaust system, where it's burned off without visible external leaks.
  4. Valve Stem Seals: Worn or hardened valve stem seals can allow oil to seep into the combustion chambers, especially when the engine is cold or during deceleration.

What to Do:

  • Oil Consumption Test: An Audi dealer can perform an official oil consumption test. This involves topping off the oil, sealing the dipstick/fill cap, and having you return after a certain mileage to measure consumption. This is often the first step for warranty claims.
  • Inspect PCV Valve: Have a mechanic inspect or replace the PCV valve. This is a relatively inexpensive fix and often resolves the issue. Look for codes like P051B - Crankcase Pressure Sensor Circuit Range/Performance.
  • Check for Turbocharger Issues: Listen for unusual turbo noises (whining, whistling) and have the turbocharger inspected for excessive shaft play or oil residue in the intake/exhaust pipes.

When to See a Shop:

Given the consistent consumption, it's important to have a qualified Audi mechanic or dealership diagnose the problem. They can perform the official oil consumption test, check for PCV system faults, and inspect the turbocharger. If the issue is severe and related to piston rings, it can lead to carbon buildup and potentially catalytic converter damage over time. Addressing it sooner rather than later is advisable to prevent more costly repairs.

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