One of the few reasons I am envious of you cummins boys lol. I still take my Ford first though but my 6.0 will only get about 18 or so on the highway and I average about 17 overall and then hooked up to a load it dwindles pretty quickly unlike your straight six. And I totally understand on the fillups //content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif 36 gallons at $4.79 hurts.My truck gets around 21mpg, but the $160 fill ups still hurt.
