to begin with, most days I did it all electric and still have 2 or 3 miles of range remaining when I get back home,
recently the engine runs for the last couple of miles because there is nothing left in the battery
but this last week, with the drop in temperature, and it being dark and raining on the way, and on the way home ... having the fan and heater on means that when I get in the car to come home, I've only got about a third to quarter left in the battery when I get in to do the return leg
and the engine is running for a noticeable amount of the journey