Hi all. This is a sad first post for me. I bought an 07 Audi RS4 about a month ago. The car has high mileage, 122k miles, but is clean and drives really well. I *thought* I got a really good deal on it until I changed the oil last week. I noticed very small copper like gold flakes in the oil after I drained it. Its very fine and looks almost like metallic spray paint. I did a little bit a research and it seems like the rod bearings may be the only parts with copper(?). Is this motor done for? Should I stop driving it and consider a rebuild? The engine does not tick loud or knock. I called the previous owner and asked him if he warmed up the car before driving hard and he said he always did. He owned it for 100k miles. I told him about the copper flakes and he said he wouldn't know because he always got his oil changed at a shop and provided the oil 5w40 lubro moly. He mentioned it could be the new parts that were recently put on the car. He got oil cooler lines replaced, intake spacers, heater bypass, and some injector work. From research, I see that oil coolers have copper too but not sure how changing the lines would produce so much copper. Any of the work above call for copper grease? I'm going to send in an oil sample for UOA but just wanted to post this to get some feelers about experience with similar material in oil.