Hi all!
I am driving a Audi A7 2013 3.0TFSI.
It looks like i am having an issue with my engine. In my coolant expansion tank i can see some oil floating on top. No sludge on the cap, and also no sludge on the oil cap. Also, not losing any coolant. I already changed my oil cooler. But after a short trip 40-50 i can already see some oil floating on top again. I have change the coolant like 4-5 times already and drove it for 1200km. It is a really minimum amount of oil. Aprox 10-20ml? In 100-150km.. what could be the cause of this? HG? PCV?
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