Experience/purchasing consulting engine (Grand) Kangoo

Hello together, we want to increase our car size and exchange our Skoda Fabia into a HDK. We have now decided for a Renault Grand Kangoo. However, I am still undecided about the motorization. The petrol engine seems to be a Japanese and quite suitable, however, it should have a relatively high consumption. The diesel in turn is only available in the small motorization and our driving profile is also not ideal with about 20 TKM per year (about 10 times per year 500 Every week, 3-4 times a city and 4-6 times a week, 50 km at a time on the motorway). Therefore, I am looking forward to all the reports about the petrol and small diesel, maybe this helps me with our purchase decision. Also to the small Kangoo, since the Grand Kangoo is not long. Thank you very much! Johannes