Wow, just reached 818 miles on one tank of diesel (a tank being about 11 gallons). Absolutely unbelievable, an average economy of 75.5MPG. The instrument panel also reached a new related high point, with a display of “1,215 miles to empty”, up 40 on the last best (1,175 miles).
Clearly the ‘to empty’ display is unrealistic and maybe I should now stop trying to go further and further. Especially as the petrol station was actually out of diesel when I first tried to refill. Next time I’ll probably have to spend the night on the forecourt waiting for a delivery for a completely exhausted Volvo!?