[Chief Brown]

I was in a local Ram dealership recently and the subject of DEF came up. I told the service manager that I buy my DEF at the truck stops when I need some. He said oh don't do that. He said it is not the same quality as what you can buy elsewhere i.e., (Autozone, Walmart,etc). He said it would "crystalize" in my DEF tank and cause all kinds of issues.
Just wondering if anyone on here has had issues with DEF from truck stops?