On a trip to Sydney and back, my ICE uses more fuel coming home because I have to climb from near sea level in Sydney to about 3,500 ft at the top of the Blue Mountains. The gradient of tht climb is steeper than the climb coming from the other side on the way to Sydney. Also I don't have to "drive" the car from the top to the bottom when I an on my way to Sydney. The need for more fuel to go up a steep hill is commonsense. The same commonsense that applies to an EV, hybrid, plug in or diesel.