As others have said, Pilot and Flying J offer DEF at the pumps for less money than when buying it in containers. My only problem is that with a new motorhome needing DEF for the first time, I haven't gotten the courage to get it that way. My problem is that the DEF is always on the left side of the coach. My DEF tank is on the right side. So, I will have to fill a bottle, take it around the motorhome and pour it in myself in 2.5 gallon increments. Again like others have said, today I purchased two 2.5 gallon containers at a local Walmart for a little over $4/gallon.
Ed Headington