Pulling 896 Nitro, I get about 14 mpg(thats at 70 mph). If I can keep it at 60 its 15+. The truck is a 2011 f250 super duty, with about 4,000 miles on it. The one one road trip without the boat was from Col.Springs to Steamboat Springs it got 20 mpg and that was on the two lane higway. I get...