Rolled up into Big Boy's truck stop on I-95, and pulled into one of the two lanes which are DEF equipped.
I got 3.53 gallons for 2.699/ gallon. The DEF was a whopping $9.53!!!
I wasn't near empty, but it's fairly close to me, and I wanted to check out the DEF pumps, and not have to pay a lot more for individual gallons from a store.