boatto5er
Founding VA Chap Ldr (Ret)
Got the 500 miles to empty warning on my truck a few days ago. Checked all the auto parts stores around and found just one 2.5 gallon jug of DEF. Put it in the tank and was surprised to see that the warning did not go away. Searched thru the manuals but didn't find anything specific except that the tank holds approximately 5 gallons. I finally located another 2.5 gallon jug today and finished filling the tank (only took another 2 gallons). Now the warning has gone away. Guess I wasn't aware that you have to completely refill the tank when it gets low - no partial refills.