Q: I've been told that the turbo is lubricated in the system with the engine oil and I have tried adding stp..it seems that a bearing gets dry over night and squeels when 1st starting in the morning..any suggestions??
A: I own a 2001 A4 1.8T and am having the same problem. I have had all of my belts checked more than once. I noticed on mine that it will only squeal if the AC is on, but Audi insists it is not the AC belt, nor any other belt. If you find out what is causing this, please let me know.