Similar to trevor, my 300 odd mile round trip to Cornwall last week got me 47mpg. We’ve been happy with the standard X1 seats although they did need settling in the rather stiff leather at first. Sitting in the XC40 Inscription the other day didn’t seem much different. I’ve just measured the X1 seats at 51cm long and 48cm wide. I’ll measure the Volvo ones on Thursday.