had a heads up years ago that the EGR valve on my ageing (01 'Y' registered 190k miles) passat was leaking oil. it's a PD 130.
anyway, just about to change the oil etc and there's a fair amount of build up around the offending article so i was thinking of replacing it. is this necessary? in my opinion mpg is down a bit and it smokes a bit more than it used to but then it is getting a little long in the tooth so not necessarily related to the EGR.

