Why better not to use heating fuel in your diesel engine?

This episode is based on a discussion I had with an acquaintance at a barbecue. He, being the smarty pants that he is, asked "Do you know the difference between diesel and heating fuel?"... I didn't... I, being the smarty pants that I am, was annoyed by that. With a wry smile he suggested: "Better look it up then." And I did! The result is a not too shabby podcast episode on the difference between the two. If you want to know why it is a bad idea to use heating fuel in your diesel engine, tune in! Sources https://de.wikipedia.org/wiki/Heiz%C3%B6l https://de.wikipedia.org/wiki/Dieselkraftstoff https://en.wikipedia.org/wiki/Heating_oil https://en.wikipedia.org/wiki/Diesel_fuel https://www.heizoel.total.de/rund-um-heizoel/aktuelles-tipps/sonstiges-aktuelles/statt-diesel-einfach-heizoel-tanken/ https://www.gutefrage.net/frage/was-ist-der-unterschied-zwischen-heizoel-und-diesel https://www.helpster.de/unterschied-von-diesel-und-heizoel-eine-nachvollziehbare-erklaerung_115301 https://de.wikipedia.org/wiki/Cetanzahl https://de.wikipedia.org/wiki/Feinstaub https://en.wikipedia.org/wiki/Hydrocarbon https://en.wikipedia.org/wiki/Catalyst_poisoning https://de.wikipedia.org/wiki/Klopfen_(Verbrennungsmotor) https://www.goodscience.com.au/year-9-chemistry/acid-metal-reactions/