This, from 2016, seems to be the original post and seems to be fairly well written, if surprising and controversial https://www.businessinsider.com/heres-what-

This, from 2016, seems to be the original post and seems to be fairly well written, if surprising and controversial https://www.businessinsider.com/heres-what-idling-your-car-in-the-morning-is-doing-to-your-engine-and-its-not-good-2016-1 https://www.businessinsider.com/heres-what-idling-your-car-i...