The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Excessive Oil Consumption in 2017 Audi A6 2.0T - What to Check?

0

Tom H. · rep 0 · May 22, 4:32 AM · 1 replies · solved · Question

Vehicle: 2017 Audi A6 2.0T

Hello Audi community, I'm reaching out because I'm experiencing what seems like excessive oil consumption in my 2017 Audi A6 2.0T (C7 generation). I've noticed I'm adding about a quart of oil every 1,500-2,000 miles, which seems really high for a car with only 70,000 miles on the odometer.

I haven't seen any visible leaks under the car, and there's no blue smoke from the exhaust that I can tell. The car runs fine otherwise, no warning lights yet, but I'm constantly checking the oil level. I'm worried this could be a precursor to a bigger engine problem.

Is this level of oil consumption normal for this engine (EA888 Gen 3), or should I be concerned? What are the common culprits for this issue in these models? I'm trying to gather some information before I head to a mechanic. Any advice on what to ask them to look for would be great. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:32 AM

0

ClearTheCode admin answer:

Excessive oil consumption in the Audi 2.0T EA888 engine, particularly in the 2016-2018 model years, is a well-documented concern, though the Gen 3 engines (like in your 2017 A6) are generally improved over earlier generations.

  1. PCV Valve (Positive Crankcase Ventilation) System: A failing PCV valve or its associated components is a very common cause of increased oil consumption. A faulty PCV can lead to excessive crankcase vacuum, pulling oil into the intake manifold to be burned.

    • Action: A visual inspection of the PCV valve and hoses for cracks or oil residue is a good start. A mechanic can perform a smoke test to check for vacuum leaks. While not always throwing a direct OBD code for oil consumption, a failing PCV can sometimes trigger codes like P0171 (System Too Lean) or P0507 (Idle Air Control System RPM Higher Than Expected) due to vacuum leaks.

  2. Turbocharger Seals: Worn or failing turbocharger seals can allow oil to leak into the exhaust or intake side of the turbo, where it's burned off without visible external leaks.

    • Action: A thorough inspection of the turbocharger for oil residue in the intake piping (post-turbo) or exhaust housing can indicate this issue.

  3. Piston Rings/Oil Scrapers: While less common in the Gen 3 compared to Gen 1/2 EA888 engines, worn or stuck piston rings can still contribute to oil consumption. This is a more significant internal engine issue.

    • Action: This is typically diagnosed after ruling out PCV and turbo issues. A compression test and leak-down test can provide clues, but often a borescope inspection of the cylinders is needed.

When to See a Shop: Given the rate of consumption, it's advisable to have your A6 inspected by an Audi specialist. They can perform a proper oil consumption test (monitoring oil levels over a set mileage), conduct diagnostic scans, and visually inspect the common failure points. Addressing this proactively can prevent more serious engine damage down the line.

Menu

Help & account