Ok, I measure mine from the Podpoint APP which includes losses. The biggest killer over the cold snap is preheating, I could not let my wife getting cold now she is out of hospital. Now it has warmer up a few degrees I should be back to 49/50 miles with the heating on.
Don’t have that option mate with the Tucson, as it requires the engine on high tickover for provding heat and adopts a bypass valve so the cabin heats up along with engine. Therefore in the winter the engine is required and often running at high tickover (1100rpm) till the set temperature is met, then once residule heat is used the engines back on again. I don’t find the heat produced is as warm as an ICE.
Preheating requires the old method 😂