First, there was no way to pre-pay using a credit card at the pump in the big-rig lanes. The pumps are set up for truckers with company credit accounts and do not accept credit cards. This required going into the store and waiting in line (for 5 minutes) to provide my credit card to the cashier. I asked to fill up with DEF, and this was where the experience became truly annoying.The cashier informed me that I would have to purchase diesel first, and then pump DEF on the same transaction. Since I had just filled up with diesel 50 miles earlier and I advised the cashier that I did not need diesel, only DEF. No exceptions, she said, it’s all automatic.