Just a word to the wise.....I would recommend you consider the following:
Should your truck be under warranty, and an issue with your DEF system crops up, and you are using some off-brand DEF, it is possible you could be refused warranty especially if what you put in was old or contaminated.
By using and keeping your receipt for Motorcraft DEF purchases, preferably from the FORD dealer will eliminate the BS entirely. Why take a chance for a few bucks or convenience. Should an issue develop, using what FORD sells takes away the problem you will likely face when they deny warranty based on crappy DEF in your tank. Yes....DEF is basically all the same product, but it IS SENSITIVE to heat, age, storage temperature etc, and can crystallize quicker that you know what. For what it costs, get it from a dealer, and keep the receipts always. Just some optional friendly advice.....your experiences may vary.