I apologize if my tone implied that your question was illegitimate. I thought that someone reading your comment might think that IC engines do not lose efficie

I apologize if my tone implied that your question was illegitimate. I thought that someone reading your comment might think that IC engines do not lose efficiency in low temperatures. I wanted to make it clear that in fact they do, but that they don't fundamentally have to. I did not present an explanation because I did not know the correct explanation (thanks for that link).