Following.Hi folks. Followup question. I'm wondering which drive mode would be most fuel efficient for towing an 1800 lb trailer, mostly on interstates at around 100 km/hr. Tried eco and was getting above 18 L/100km albeit in northern latitudes. Tried Smart and I'm getting about 15 L/100. Normal hwy is about 8 L/100with no trailer . So these towing fuel consumption rates are high IMHO. Any advice much appreciated!