The best price DEF is at the truck stops......anywhere from $2.599 to $2.799 per gallon. Buy it in bulk.....and don't have any messy boxes, containers, and nozzles to toss away.What is the best price and brand of DEF?
I'm on the road alot (79,430 miles in a little less than 14 months) but I have the 5.5 gallon tank as my rig is a pickup. For me, since I tow so much, the different things I tow almost always require me to purchase fuel at truck stops, as navigating my truck & trailer at a "mom & pop" style operation make it next to impossible.GSB is right,IF you run the big road all the time and have a C&C with the 9 gal tank.. For us that use our truck as a daily driver and are not near the big truck stops the 2.5 gal jugs are just as handy.