how many miles until u need to refill the D E F

[hendrix6.7]

so have 2400+ miles no towing yet just driving to work and where ever else, just checked the system info out and said under 1/2 way thought the fluid was suppose to last 7500 what is everyone else's miles before filling

[BIG Laing]

Its about a gallon every 1000 miles. Most people I know top it off when they do their oil change. (5K mile oil changes BTW)

[BIG Laing]

And it's possible Your tank wasn't topped off to begin with...

[vgostomski]

I topped my tank off at 1000 miles, about 2.5 gallons. At the oil chage, 5000 miles, I topped it off again. Just over 2.5 gallons, so, it probably wasn't full at the beginning. It will vary with your style of driving. Also, remember the tank has a heater, not the fill neck. So, if you live in the cold country, just add 2.5 gallons and go.

["Stroker 8"]

I top mine off every month and have since New.

[bcangelo]

2.5 gallons every 4k

[MDarrough]

Towing a heavy trailer will change things dramatically!!

I pulled my 5er from central Texas to Colorado & back, about 1700 miles, and it burned nearly a full tank. We were directly into the wind a lot, and Raton pass was quite a long hard pull too.

Mark

[XPD77]

I've heard from several sources that they don't fill the DEF tank completly full from the factory. Probably only 1/2 to 3/4 full from the factory. I'm at 5600 miles now and mine says that its under half full. I will just keep going until it tells me to put more in.

[a2designs]

Originally Posted by XPD77

I've heard from several sources that they don't fill the DEF tank completly full from the factory. Probably only 1/2 to 3/4 full from the factory. I'm at 5600 miles now and mine says that its under half full. I will just keep going until it tells me to put more in.

When i bought mine new (with 25 miles on it) I had the refill DEF message at 300miles. I just topped off my tank this past weekend and used a half of box of BLUE DEF and i just clicked 6000 today. So I guess take that for what its worth.

[FordFascist]

I used my truck to tow and I'm getting about 1000-1200 miles per gallon of DEF. If you don't use your truck for what it is intended for, you will use far less DEF.