hahaha.... Kobus, now you have the power of a 4.2 turbo diesel and soon you will get the same fuel consumption
but seriously, that is very good consumption from a simple PCV cleaning!!! Well done my friend, I'm sure there will me many 4.5's doing the same !!
Clem, you may just have a point there about your 4.8 still being new and not yet needing the PCV sorted out. It would be interesting to see on an older 4.8 if this also can make a difference...
( Can't do any harm )