I have a 2004 Lincoln Aviator AWD Ultimate with Heavy duty tow package option. I took my travel trailer out for the first time last weekend and figured that I would get about the same mileage as my old Silverado which was around 10-11mpg. Boy was I wrong. I managed to squeeze a whopping 8.3 mpg average out of my mostly flat land trip. Is 8.3mpg typical towing mileage for the aviator? Anyone else tow with there aviator? My trailer is an 18ft weighing in at 3500#. I would also never believe that this vehicle could tow it's rated 7300# maybe down hill?!