Have a nx 2016 330h luxury - do a lot of town driving so loving the peaceful drive! I find that with BP ultimate fuel (the expensive one!) I am getting 44mpg - with other fuels I seem to slip down to 39mph? Have not had the car long, has anyone else had similar experiences? Quite pleased with the 44mpg as my last car was a diesel BMW320x estate - same driving around 35mpg.