The Scandinavian Mile[0] exists, but it's not a thing in Denmark - just Sweden and Norway. There is a separate Danish mile, but I've never heard anyone talk about it in Denmark, although you can still find the odd mile stone [1] using a mile that's different to both the Scandinavian one and the UK/USA one.

But yes, using the Scandinavian mile for a car's odometer would be strange even by Swedish standards.

[0] https://en.wikipedia.org/wiki/Scandinavian_mile

[1] https://da.wikipedia.org/wiki/Milep%C3%A6l