I typically get 330 miles per tank 530 km as per the GPS log (summer time). Using around 75-77 liters on a fill up typically (19.8-20.3 US Gallons). I'm on 31.5" tires (285/60r18 Geolander AT-S).
This translates to about 14.5 L/100km or 16.22 MPG (US). It's around 75% hwy, 25% city normal driving with "occasional" heavy footed acceleration.
I use 89 Gas.
T.