There is a lot to the PCV systems & good / bad points about them, they are totally different on both motors, so each needs a different solution & to stay legal, they have to vent back into the intake (which can add to carbon build up over time).
Catch cans can help (only legal is plumbed as above) but with the TSI engine & the 100ml per lap thing, it has to have a one way dump back to the sump. Otherwise it would fill up in a very short period.
Bookmarks