Well I have now blanked of the erg valve, removed the butterfly valve and washed out the intercooler and add 2T to the diesel.
So today went for a run up the Arnhem Highway from Darwin east towards Kakado. Yes I think it runs smother and maybe quieter. I had to stop after 90km as the road was closed due to floading. Now that was a site to see people standing knee deep in water on tarseal, flicking lures further down the road hoping to catch a Barra.
When I left home I filled both tanks, and 189kms later I filled both tanks again 19.5 litres
That will do me fine 10 litres per 100km, last time I checked on similar run, it was more like 13 litres per 100km