Interesting. When I had issues with the BMW dealership over my X1 I had the chance of a Karoq 1.6tdi. I really didn’t want a diesel but the thought of 60mpg+ was enticing but I stuck with the BMW. Huge mistake as the X1 had major transmission problems and I had to terminate early and I went for a petrol Tucson. My biggest concern was the fuel economy but I have been getting between 36-41mpg per tank (measured brim to brim) with a mix of driving and despite the new WLTP figures, which are a better indicator, it seems certain cars, particulaly European ones struggle to achieve whilst others, including Korean and Japanese exceed. Likewise the on board computers in certain cars, again European, overstate the actual consumption. After filling up my Octavia or X1 I was always downbeat having discovered the actual fuel economy was 8-10% lower than shown(40vs 44) whereas I usually have a smile having achieved 5 or 6% more(38vs 36.5).
42mpg for a small diesel is not great at all. Perhaps it may increase once the engine is run in?