The sight of a milky residue on the oil cap is understandably worrying, but in this case, it seems to be driver error.
Modern engine bays are filled with black plastic where bright cast aluminum once sat, and few parts symbolize that shift more ...
"BMW removed the spare tire for the more realistic emergency you’d have." Car enthusiasts love discovering thoughtful design features that show engineers actually considered real-world driving ...
You’re going to have to do your research and maybe even set a customer up with an oil consumption test in your shop.