DEF tank size
We have a new 2013 Fleetwood Expedition. I thought the DEF tank was suppose to be 5 gallons. It read at the dash and the tank gauge half full. I added 2.5 gallons and it only came up to 3/4 full. ...
Forum Discussion
Current Freighliner chassis have 13 gallon DEF tanks. Mike at Camp Freightliner says the average tank of DEF should last about 4500 - 5000 miles. I found that under severe driving conditions (mountains, heat, and high rpm) we achieved 4000 miles on the 13 gallon tank of DEF.
