Traveling yesterday my DEF was down to 1/8th tank so I found a Loves Truck Stop with DEF at the pump. At first, I thought they didn't have it. I kept looking for a blue pump handle but couldn't find it. The pump said DEF and had a button to push but no nozzle. I thought maybe only a couple pumps had it but a mechanic told me all the pumps have it. It's behind a covered compartment on the pump. I guess it's because DEF is so caustic. Good thing was the nozzle and handle were clean. I have read posts where some complained on trips about buying DEF at the pump because the nozzle was extremely dirty. Maybe Loves has the fix.