I'm new to this forum and I've been thinking about buying f150 diesel. I have an 08 Toyota tundra with the 5.7 with 4.20 rear end that I use to pull a 16' enclosed trailer (5000-6000lbs) for my girlfriend's scuba business on the weekend. We drive about 600 miles once or twice a month on the mostly flat land of west Texas and central New Mexico and the tundra pulls the trailer well but it loves the gas and is getting old. I love my tundra but Toyota hasn't touched the tundra powerplant from its release (07 I think) and with the girlfriend Chevy Suburban transmission taking a dump I need to make a move. I can't really justify a super-duty because it is my daily driver and I think it would be overkill. By the numbers to the 3.0L f150 looks to be a good choice for me but I wanted to get some real-world opinions on tow with it. I'm looking at f150 super crew 2X4 with the 3.55 locking rear end in hope of saving a little on the mpg but still pulling well. I worry that the diesel will run out of breath with some of the speed limits out here being 80mph (if you can't keep up the oilfield traffic will run you over). Some 2x4 towing mpg numbers and range and some unbiased opinions to get me to jump the fence. thanks in advance.