I've seen (somewhat) honest Tesla owners on Youtube saying that they lose 20% of the battery's charge when left outside overnight in the winter. That range would drop by 40% when driving in winter compared to summer. But the other side of it is Gas engines have many moving parts, the metal goes from freezing cold to extremely hot, metal expands and contracts, and things break. Brushless electric motors have one moving part and aren't affected by temperature. Electric motors are light years better than gas engines. The issue is the batteries. Batteries are a horrible way to store energy. And as someone who lives where it gets cold, I hate hearing people tell half truths about electric cars by never acknowledging the batteries and the cold. Yes every car company does things like test gas mileage and towing capacity in perfectly ideal conditions. But batteries and cold weather are a huge factor where they lie by omission.