Audi Oil Separator Problems: Causes and Insights
...A malfunctioning oil separator can also cause your vehicle to fail emissions tests. Excessive smoke and oil consumption can lead to higher emissions, which could mean failing your local emissions test and facing fines or required repairs....
https://enginecrux.com/audi-oil-separator-problems-causes-and-insights/
S4 (B8 Platform) Discussion - AudiWorld Forums
...S4 (B8 Platform) Discussion - Discussion forum for the B8 Audi S4 produced from 2009-2016...
https://www.audiworld.com/forums/s4-b8-platform-discussion-134/
11 Most Common Audi S4 Problems (Explained) - Engine Patrol
...The PCV valve or air oil separator of the B8 and B8.5 models of the Audi S4 are known to fail or develop cracks even before the car reaches the 100,000-mile mark...
https://enginepatrol.com/audi-s4-common-problems/
Common Problems with the Audi B8/B8.5 S4 - ECS Tuning
...These are the common issues we?ve found with the Audi B8/B8.5 S4 and how you can address them with some help from the best source for European parts and accessories anywhere....
https://blog.ecstuning.com/common-problems-with-the-audi-b8-b8-5-s4/
New S4 B8 owner, oil consumption issue, looking for advice..
...It's completely normal for our cars to use a quart of oil between oil changes every 5-7500 miles even with a fresh carbon cleaning, new PCV and full tune up on the car....
https://www.audizine.com/threads/new-s4-b8-owner-oil-consumption-issue-looking-for-advice.994527/
Insights on Audi B8 S4 Problems: Issues and Owner Feedback
...Regular maintenance and timely diagnostics are key to keeping your Audi B8 S4 in top shape. If you notice any of these symptoms, don?t hesitate to consult a qualified mechanic for a thorough inspection....
https://enginecrux.com/audi-b8-s4-problems-facts-feedback-and-recalls/
How To Replace The PCV On A B8 Audi S4 (Audi A7, S5, & SQ5)
...Replacing the PCV (or air oil separator) on a B8 Audi S4 isn't a difficult job, it just requires a lot of steps. Our DIY guide covers from start to finish....
https://www.fcpeuro.com/blog/how-to-replace-the-pcv-b8-audi-s4-s5-sq5-a7
Audi S4 burning smell causes and how to fix it - WheelsJoint.com
...An engine oil leak can cause burning smell in Audi S4, particularly when oil drips onto the exhaust system. The surface temperature of exhaust pipe or manifold can cross 800 degrees Fahrenheit (426 °C) under normal driving behavior....
https://www.wheelsjoint.com/audi-s4-burning-smell-causes-and-how-to-fix-it/
How reliable are the B8.5 S4s? : r/AudiS4 - Reddit
...Oil (I only put 5W-40 in it, but depends on region where you live) needs to be changed every 10k km to 15k km depending how much you drive. Waterpump and PCV are also a big deal and needs to be replaced every 60k km or if they leaking....
https://www.reddit.com/r/AudiS4/comments/wr7xwj/how_reliable_are_the_b85_s4s/