2012 with 30k miles here, probably 3k pulling my 12k+ lb fifth wheel. Only issue has been an EGT sensor which caused the truck to tell me to pull over safely NOW. Got towed to Ford dealer and fixed within an hour or so - they immediately knew what the problem was so guess it is common.
I get about 17mpg mixed in town and highway, and anywhere from 9-12mpg towing depending on wind mainly. For example got 12.5mpg towing to west Texas (up hill from Houston) recently, but only 10 coming back due to strong head/cross wind.
