Thanks @MFillingham I appreciate your thoughts. As I said, the shortest car journey I ever make is around 20-30 miles round trip and almost all journeys involve the motorway. They won’t be frequent though. Some weeks it might only be once.
As far as I understand it, that should be fine.
My personal understanding is incredibly limited but the mechanic (who usually gives me limited grief about the EV) was talking about the limitations of the filters. However, he gave me the impression once it all warmed up and was going at speed, everything worked to plan. You should be fine.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark