Just returned from a SxS trip to Salmon, Idaho. 2018 Ram 3500 with Aisin averaged 26.7L/100 pulling a 43ft toyhauler just wondering if this is about right, seems high. Truck has 23k+ travelling at speed limits (truck limits in US).
I think your dealer is full of s—t, hitches are supposed to bolt onto the frame. Also it’s pretty tough to get a tow vehicle, fifth wheel toy hauler and a tag trailer all together under 20 metres, but it can be done.