Yes, we do all know this. But incorrect conversion of litres to kilograms or vice versa is likely to be irrelevant to the cause of this accident, as per my earlier post.
BTW, in my tech log, I use the annotation "LTRS" for litres, to avoid any confusion.
Another possible gotcha is engine oil quantity. The oil contents (and maximum usage rates) are quoted in litres. The oil is packaged in US Quart cans.