I'm at 17.5 on the first tank of fuel. I only have 300 miles on it though. F350 CC Longbed 4x4 SRW. Has a 48 gallon tank. 800+ mile range according to the dash.
I've read where some are getting 20 or better after a few thousand on the odo.
I have had a ton of idle time and mixed low and high speed driving though, been playing with it a lot.
Similarly, I'm getting 15.3 MPG on my 2017 SRW on the first 650 miles travelled. Most of it has been highway driving at 75-80 MPH. Too soon for a balanced read but I'm getting just about the same as the 2013 SRW I traded in.
My 2011 F350 SRW LB 4x4 has a 11,500 GVWR and a 23,500 GCWR. Looks like the same configuration on the '17 has the same GVWR, but a 28,200 GCWR. That's an increase of 4700 lbs. Wow! Can that be from the new boxed frame?
The Advanced Security Pack is standard on Lariat and above. It's an option on XLT. What does it do? Yes, I read that it has an intrusion/inclination sensor. So, what does it do if it senses an intrusion/inclination? Set off an alarm? Disable the ignition?