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Old 09-01-2016, 10:19 PM   #1
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How much DEF does your diesel use?

I have a 2016 F350 SRW 4x4 and tow a 34' fiver. I topped off the DEF tank before leaving on a short trip last week. Trip was about 300 miles round trip. So, today I decided to top off the def tank again. It wouldnt hold a teacup full, which surprised me. My previous 2011 6.7 would have used a half gallon to a gallon on a 300 mile towing trip. Anyone have a clue or do the newer trucks use a lot less def? It just rolled over 10K miles this week.
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Old 09-01-2016, 10:33 PM   #2
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I have a 2015 F250. Same engine as you and I will guess as to how much I've used. I have about 17000 miles on the truck and I bet I've not used much more than 10 gallons. The truck only holds 5 gallons and the warning will not come on until the tank is less than half full.

I'm just guessing because I usually top off at truck stops when I'm towing since they have bulk DEF. I don't recall doing it more than about 5 times since I've owned the truck. Does not use much is the bottom line...
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Old 09-01-2016, 11:04 PM   #3
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I have a 2014 duramax srw 4x4 and tow a 40' full profile fiver. I think I get about 4000-5000 miles out of a jug of blue definitely.
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Old 09-01-2016, 11:33 PM   #4
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Zero DEF!

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Old 09-01-2016, 11:59 PM   #5
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Interesting topic since I pick up my 2016 F350 XLT on Saturday.
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Old 09-02-2016, 12:12 AM   #6
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Originally Posted by another_newfie View Post
Interesting topic since I pick up my 2016 F350 XLT on Saturday.
You will love your truck. Some folks make a big deal about DEF but I hardly ever think about it. In the scheme of things it is not a top priority of cost.

When I pull,my 5ver I usually fuel at Pilot since they give me 3 cents discount on diesel (no biggie) but they accept my credit card without having to go inside to cashier. They have bulk DEF at the pump also. Diesel pumps at 20 gal/min so know how much you need and back off the speed when you start approaching your need. Truckers don't mind either and actually if it is busy they will get behind you because they know you will not be there long..lol...
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Old 09-02-2016, 02:02 AM   #7
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The newer trucks typically burn more DEF when loading and are burning more fuel.

My Ram 6.7 burns about 2.5 gallons for every 3000 kms which is almost always 50/50 towing and unloaded.

The Dodge has a gauge which doesn't move the first 2ish gallons used as well. I don't recall what Ford has and I know GM has none.


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Old 09-02-2016, 06:46 AM   #8
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Have a 2016 Chevy 2500 with the duramax. I am currently on a 8K mile trip pulling my Stealth at about 9K pounds. I am burning about 3 gallons every 4K miles.

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Old 09-02-2016, 07:08 AM   #9
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I'm at 19500 km, now and have filled the tank twice now so ten gallons, other than being a pain in the b to fill I'm happy.
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Old 09-02-2016, 07:26 AM   #10
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I put in almost 4 gallons in 2800 miles (50/50 towing) but I am questioning whether the tank was full when I purchased the truck in June. I do not have a gauge and my warning light never came on.
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