I got 4.7l/100km average
after repairing the leak on my exhaust,
installing catalyst back,
changing my oil to 0W20
and cleaning the MAP/IAT sensor combi with maf cleaner.
I also increase the tyre pressure by 0.5bar to 2.5bar
Will try and see how far the AVG L/100km will drop from here.
with E5 98 it dropped to 3.8L/100km with E10 its 4.6L/100km on 6000km run