Milage check on my 07.5

[CUMMINZ]

We took a trip from home to the TN border on I-40 and hwy. 226 this weekend. Filled the tank to the brim and drove the speed limit the entire time. Overhead was showing from 16. 5 to 20. 5 . . Got home and trimmed the tank. Got hand calc 18. 5mpg. Wow. My 07. 5 has 71,000 miles on it. This truck weighs 11,000#s empty. I have spent many days and trips tuning my Smarty. My sig tells what I have. I am real proud of my truck. :-laf