2001 ram 2500 here - 17-18 mpg pulling the open trailer at 65-70 mph and 10-12 mpg pulling the 28 foot enclosed the same mph. I have the superchips programmer set on the middle setting and it gets 22-24 empty towing nothing.It is a 2wd sport shortbed and I still love it.Just had to replace the injector and lift pump at 104K miles. It now has 114K on it and going strong.