I have the exact same model Kuga and now 50,000+ miles on the clock,with well over half this mileage has been towing caravan. Have always towed in Normal setting and gives bags of power and MPG is excellent. Only just came home a few days ago and 34 MPG. Solo 45 to 47 regular. The best tow car I have had being superior to the Landrover Discovery,Kia Sorento and Hyundai Santa Fe Auto’s previously owned,for pulling performance and fuel economy.
Two years ago on a solo trip in a flat area no hills achieved the best MPG ever, of 53 MPG.