My IS300h has now done around 1300 miles on a mixed bag of roads and based on "range" should reach 1400 before the tank is empty. I have, I believe, used around 30 gals which equates to 46mpg. However, the dash tells me that I am doing around 52mpg. This seems to be a common experience but not sure why?
I do know at least that my visits to the petrol station have considerably decreased since swapping from my Octavia auto.