Oil separator (PCV) diaphragm longevity
Oil separator (PCV) diaphragm longevity. I had my 2009 A4 for 40k miles (acquired used at 44k miles) before it needed the oil consumption correction process performed. Part of the stage one was the replacement of the oil separator with a J revision (which was used on the B8.5 engines). Apparently, the reason for the oil separator and front main ...