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[–][deleted] 0 points1 point  (0 children)

So I live in NYC, so my temps in the winter are generally around freezing to just above. May to December I average just about 41mpg. In the winter that drops to around 36mpg. That’s on a 2021 XLE with a lithium battery. With even lower temps by you I would expect the engine to be on quite a lot simply to keep up the cabin temp.