Car has started to smoke under idle much heavier now! The car only smokes when it has been sitting for 1min+ and is much worse when starting on a hill or the car is fully loaded. Apart from this the car does not smoke at all, no start-up smoke, WOT...ect and has an almost new K04 turbo. It does have quite a large amount of blow-by with blue smoke through the oil cap too, I found this post below while searching, no replies unfortunately. I am fairly sure that this is the piston rings as I have been told this before but this PCV valve has got me thinking - do I really need an engine rebuild after all? Is there any way to really pinpoint this oil leak? Thanks for any help!