DEF used

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Jun 27, 2017 | 11:34 AM

petei

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Tuned

Joined: Jun 2010

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DEF used

How much DEF do you use?I pull the FW and I burn about 3 gal for 1100 mile.I think that I use less on the old 2011 F350.

Jun 27, 2017 | 12:27 PM

Seastacker

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Joined: Nov 2016

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I got the 500 mile DEF warning on a trip this past weekend. I drive mixed (commute, highway, towing 9k# travel trailer). I had about 4500 miles on it when the light came on. Not sure on how much this equates to in terms of gallons, but I dumped a 2.5 gal jug in and am now just over 1/2 tank.

Jun 27, 2017 | 12:36 PM

Top_Speed1

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Joined: Jan 2017

Posts: 1,069

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From: Finger Lakes, NY

I can tell ya one thing, it goes about 3X faster when pulling heavy. My first 1000 miles (break-in/empty) I still showed a full tank. My next 800 miles of towing heavy, gauge was on Empty. So I got the warning light on at about 1650 miles total.

Pulling heaving loads Def (pun intended!) eats up a lot of DEF. I found it on my road trip at a Virginia Pilot/Flying-J; (pump dispensed) for only.... $1.89/gal.

Jun 27, 2017 | 12:57 PM

Nick77584

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Joined: Jun 2017

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Sitting at 5,500 miles of mixed use but no super heavy towing. 3/8's of a tank left.

Jun 28, 2017 | 08:45 PM

DISLTom

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Joined: Jan 2017

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At 3/4's of a tank at 2500 miles. 225 miles of towing a trailer and a VW Golf and another 225 miles of towing just the trailer. Otherwise, just city/hwy driving.

Jun 28, 2017 | 10:58 PM

wb6anp

Logistics Pro

Joined: Dec 2004

Posts: 3,541

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From: Weatherford Texas.

Just towed 6000 lbs 1000 miles, def was full when I left it is now at 93% so used very little, I mostly had active regens. I guess that means a 6000lb trailer is the same as empty.