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
TucsonJim wrote:robatthelake wrote:
DEF is Not Fuel so it has no bearing on Mileage!
What it does is clean the Exhaust system and reduce pollution.
But there is still a mileage factor to it. You consume the DEF over time and miles. Like I stated, I go about 1100 miles on one gallon of DEF. AT that rate, I could go about 5500 miles on one five gallon tank of the stuff.
DEF is not injected at a standard rate of fuel burned as many things cause increase and decrease consumption the biggest factors being humidity and air temp.
