I had been using Mopar DEF exclusively in my 2014 GC, but this weekend, I went to one of the truck stops in town and filled it from the DEF pump. If I have no problems, that's the way I'll go - it was only $2.799/gallon. The trucker who was filling his rig walked by as I was putting the DEF in and was very complimentary about my Jeep
As you might expect, the pump is calibrated for a semi, so you can't squeeze the trigger too hard, but it was no problem otherwise.