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04-26-2015, 08:19 PM
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#1
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Senior Member
Join Date: Mar 2015
Location: Jersey Shore
Posts: 105
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DEF useage
Finally got the 38A back from the dealer after 3 weeks with temp.repairs to the Lighting issue,Freightliner is still trying to locate a replacement wire harness to correct the problem.We are leaving for Fort Wilderness in 10 days and my question is about with the 340 Cumming and how many miles are you able to go per gallon of DEF or how much DEF per tankful of fuel.
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04-26-2015, 08:25 PM
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#2
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Senior Member
Join Date: Nov 2013
Location: Seaford, De
Posts: 2,377
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most vehicles use DEF at a rate of around 2% per gallon of fuel
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David & Lynn 2014 Coachmen Chaparral Signature 327 RLKS 2016 Ford F350 Lariat CC Dually
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04-26-2015, 08:35 PM
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#3
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Member
Join Date: Jul 2011
Posts: 73
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I left Nashville went to Maine and other places 3600 miles and had above 1/4 of DEF when I got home.
Mike
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04-26-2015, 08:51 PM
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#4
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Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
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I don't know about per gallon, but you can go across the country on a tank of it.
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Dan
2014 Berkshire 390RB-60
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04-26-2015, 09:34 PM
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#5
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Senior Member
Join Date: Feb 2015
Location: Lake Havasu City, AZ
Posts: 630
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Quote:
Originally Posted by dan-nickie
I don't know about per gallon, but you can go across the country on a tank of it.
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50 gallons diesel = approx. 1 gallon DEF per Cummins and my experience.
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2015 Legacy 340KP
2012 Wrangler Sport
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04-26-2015, 09:55 PM
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#6
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Senior Member
Join Date: Mar 2015
Location: Western Washington
Posts: 111
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Quote:
Originally Posted by oldkeywest91
Finally got the 38A back from the dealer after 3 weeks with temp.repairs to the Lighting issue,Freightliner is still trying to locate a replacement wire harness to correct the problem.We are leaving for Fort Wilderness in 10 days and my question is about with the 340 Cumming and how many miles are you able to go per gallon of DEF or how much DEF per tankful of fuel.
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My Chevy 3500 uses 2.5 Gal per 5,000 miles..hope that helps.
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2015 36DBK5
2015 Chevy 3500 dually
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04-26-2015, 11:29 PM
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#7
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Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
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Quote:
Originally Posted by captnrick3
50 gallons diesel = approx. 1 gallon DEF per Cummins and my experience.
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Sounds about right.
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Dan
2014 Berkshire 390RB-60
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04-27-2015, 05:53 AM
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#8
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Senior Member
Join Date: Mar 2015
Location: Jersey Shore
Posts: 105
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Thanks,gives me an idea on how far I can travel on tank while on vacation.
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04-27-2015, 07:45 AM
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#9
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2011 Berkshire 390BH
Join Date: Aug 2011
Location: Lancaster, NY
Posts: 1,063
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Oldkeywest91, the DEF system is not like your fuel tanks, that you can run down to near empty. If you do, you will need to get towed and the red engine symbol will come on. I get about 3000 miles on a tank of DEF. I have indicator lights near my fuel gage. 4 green lights full, 1 green light ok, turns to yellow - should have filled it at 1 green, yellow turns to red, don't stop the engine, will not restart, got about 400 to 500 miles (per Freightliner) till shutdown and having to get towed in.
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Craig
Finally completed all State visits in August 2011 with a trip to North Dakota.
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04-27-2015, 09:12 AM
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#10
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Senior Member
Join Date: Apr 2008
Location: Long Island (Nassau County), NY
Posts: 4,352
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Oldkeywest91,
We get about 350 miles (+/-) per gallon of DEF so if you are going to FW, you should use somewhere in the neighborhood of 7 gals of DEF for the round trip- estimating a 2500 miles trip. Your tank holds 13 gallons. This, of course, is just an approximation.
Tom
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Tom and Margaret
2014 Berkshire 390bh-60
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04-29-2015, 05:30 PM
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#11
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Senior Member
Join Date: Oct 2011
Location: Alberta Canada
Posts: 440
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Using your numbers I would.suggest the following. If a full tank of DEF is 13 gal and you used 3/4 ... you used 9 gal of DEF in 3600 miles. Now I get about 1000 miles on a 50 gal dsl tank
So over your distance you would have used 3.6 tanks of dsl or 180 gal. 9 gal of DEF for 180 gal of dsl is a ratio of 5 percent Def per gallon of dsl.
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04-29-2015, 08:03 PM
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#12
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2011 Berkshire 390BH
Join Date: Aug 2011
Location: Lancaster, NY
Posts: 1,063
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Lefaiver, Are you saying you get 1000 miles on 50 gals of Diesel? Is that with your Motorhome? get about 1100 on 100 gals if Diesel with my Motorhome and I thought that was great!
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Craig
Finally completed all State visits in August 2011 with a trip to North Dakota.
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04-29-2015, 08:04 PM
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#13
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2011 Berkshire 390BH
Join Date: Aug 2011
Location: Lancaster, NY
Posts: 1,063
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Spell check is nuts again - sorry
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Craig
Finally completed all State visits in August 2011 with a trip to North Dakota.
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06-12-2015, 11:06 AM
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#14
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Senior Member
Join Date: Jun 2013
Posts: 10,833
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I just added DEF for the first time. It said I had 200 km till empty. Went to Flying J for the bulk DEF. Added 7 litres around $5.00 CDN. My display said I had 900 left on the tank being full. Now this is a new truck. The regen happened just as I was shutting down, it did it again when I started later so I used up a cleaning cycle. I think I am going to get a small gas can and fill this and refill when needed.
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B and B
2022 Venture RV SportTrek STT 302 VRB Travel Trailer
2018 Heartland Landmark 365 Louisville 5th Wheel
2015 Heartland Bighorn 5th Wheel
2013 FR Rockwood 8289WS 5th Wheel
2012 FR Rockwood 2703 SS Travel Trailer
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06-12-2015, 04:20 PM
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#15
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Senior Member
Join Date: Nov 2013
Location: Seaford, De
Posts: 2,377
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what would be the purpose of the gas can? You can go a few thousand miles on a tank of DEF and it's not hard to find in 2.5 gallon jugs. Contamination is a big issue so you don't want to be using any type of containers. It also has a shelf life. Also, regen and DEF have nothing to do with each other. 2 different systems. Regen uses diesel to burn off soot.
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David & Lynn 2014 Coachmen Chaparral Signature 327 RLKS 2016 Ford F350 Lariat CC Dually
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06-13-2015, 12:48 PM
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#16
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Senior Member
Join Date: Feb 2015
Location: Lake Havasu City, AZ
Posts: 630
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Quote:
Originally Posted by B and B
I just added DEF for the first time. It said I had 200 km till empty. Went to Flying J for the bulk DEF. Added 7 litres around $5.00 CDN. My display said I had 900 left on the tank being full. Now this is a new truck. The regen happened just as I was shutting down, it did it again when I started later so I used up a cleaning cycle. I think I am going to get a small gas can and fill this and refill when needed.
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That does not make sense. A regen should not occur until 10's of 1000's of miles, certainly not in one week of new. And, DEF is not consumed during regen, diesel fuel is.
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2015 Legacy 340KP
2012 Wrangler Sport
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06-23-2016, 03:25 PM
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#17
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Senior Member
Join Date: Sep 2012
Location: Charleston County SC
Posts: 767
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I just drove 1900 miles from Charleston SC to Cheyenne Wy. When I started the trip I topped off the DEF tank. I filled the Def here in Cheyenne and it took exactly 5.9 gallons to top off. That equals about 320 miles per gallon. There is pretty good range on the Berk for DEF usage.
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06-23-2016, 04:06 PM
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#18
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Junior Member
Join Date: Jun 2016
Posts: 23
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I believe the common "rule of thumb" is one gallon of DEF to 50 of fuel.
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06-23-2016, 04:58 PM
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#19
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Senior Member
Join Date: Jul 2014
Posts: 7,363
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Quote:
Originally Posted by RVNVET
I believe the common "rule of thumb" is one gallon of DEF to 50 of fuel.
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Maybe a gallon to 500 mile not 50.
Russell.
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06-23-2016, 05:01 PM
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#20
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Senior Member
Join Date: Sep 2011
Posts: 522
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For me I think it is closer to 180 miles per gallon of DEF. I just did a 1900 mile trip and still have little more than a 1/4 tank of DEF.
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2011 Berkshire 390-rb-40, upgraded tires and front axle airbags, 2012 Jeep Wrangler 2 door, Blue Ox baseplate and BlueOx aladdin tow bar, Blue Ox Patriot brake system, wiring run through right frame rail and homemade led taillight bar.FB.
Ham KG5LTL.
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