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03-01-2017, 07:51 AM
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#1
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Montana Fan
Join Date: Mar 2004
Location: Bristol
Posts: 396
M.O.C. #1269
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For those who are DEF
My new truck will have 1000 miles on it by the time I leave for Florida. I'm wondering if there's any harm in topping off the DEF? That would mean I could avoid trying to fill it up another thousand miles down the road or so. Also, is anyone keeping open DEF in the back of their truck or is that basically not a good idea? Thanks in advance.
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03-01-2017, 08:13 AM
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#2
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,122
M.O.C. #6433
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No problem is topping off. I generally do it when the tank is about 1/2 full. And if the tank will not hold the whole jug, I cap it and add the rest later. But I do not leave the jug where it will be in the hot sun.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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03-01-2017, 08:27 AM
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#3
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Montana Fan
Join Date: Aug 2016
Location: Detroit
Posts: 100
M.O.C. #18932
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Captbanjo, I would also like to add that you should always check the dates on the DEF jugs you buy. Google the manufacturer, as there's not a standard. Peak Blue uses a system where you do the following in this example:
The date code on the BlueDEF box is:
GA153590089
Lets break this down into 4 groups of numbers:
GA: The designator of the plant that manufactured the DEF
15: The year of manufacture plus 1, so this DEF was made in 2014
359: 365-359 = 6, so the 6th day of the year, or January 6th.
0089: The batch code.
So this box of DEF was made January 6th, 2014.
Other manufacturers aren't as screwy.....
Safe travels
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03-01-2017, 08:54 AM
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#4
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Montana Fan
Join Date: Mar 2004
Location: Bristol
Posts: 396
M.O.C. #1269
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How old can it be and still be effective?
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03-01-2017, 09:04 AM
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#5
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Montana Fan
Join Date: Feb 2015
Location: Republic
Posts: 257
M.O.C. #16103
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From the Blue DEF spec sheet:
BLUEDEF HANDLING AND STORAGE
The shelf life of DEF is directly related to the temperature at which it is stored. Storage temperature between 12º and 86º F are recommended to maintain optimal shelf life of up to two years. If BlueDEF freezes, its efficacy will not be effected upon thawing.
I store mine in a dark area of our basement at the house which stays at 65-75* year round. I try not to keep more than a couple of boxes on hand at any time.
Dave
__________________
Dave, Barb, and Paisley the Wonder Wiemeraner
Was - 2015 3160RL Legacy Edition & 2014 F350 6.7l PSD SRW Platinum
Now - SOB
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03-01-2017, 09:20 AM
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#6
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Montana Fan
Join Date: Mar 2016
Location: Sedona
Posts: 176
M.O.C. #18355
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We have a Pilot/Flying J RV Plus card thru Good Sam. Whenever we need to top off the DEF tank, stop in at Pilot truck stop. Quick, easy, no jug to mess with and you can be sure it is fresh since the semis are using it every day.
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03-01-2017, 09:42 AM
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#7
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by BB_TX
No problem is topping off. I generally do it when the tank is about 1/2 full. And if the tank will not hold the whole jug, I cap it and add the rest later. But I do not leave the jug where it will be in the hot sun.
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This is how I do it and I use the Walmart brand. Cheaper and works just as good as any.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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03-01-2017, 12:29 PM
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#8
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Montana Fan
Join Date: Jun 2015
Location: Beloit
Posts: 283
M.O.C. #17535
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Agree with everyone. Only issue I have is my 2011 - F-250 only lets me know when I am getting low. I know Dodge has a gauge. I wish the Ford did.
Ditto on the dates and storage. I just dropped $1150. on a new def pump. The question was did I use old or contaminated DEF. Nope - Pilot or SuperTech def from Walmart. Just be sure it's clean
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03-01-2017, 02:15 PM
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#9
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Montana Master
Join Date: May 2016
Location: Cuyahoga Falls
Posts: 698
M.O.C. #18572
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My 2016 F350 has a 5 gallon DEF tank. A warning message comes on when I am at half a tank. Other warnings come on as the level gets lower. Depending on driving and towing, that 5 gallons lasts 1,000 to 4,000 miles. I do not buy the 1 gallon or 2.5 gallon jugs. Compared to filling up at a truck stop, the jugs cost too much.
A tip you all probably know... don't run out of DEF and shut the engine off, it will not restart.
__________________
ATC/NAC Jerry A. Burkholder, USN (RET.)
Rule #1. The Chief is always right.
Rule #2. When in doubt, refer to rule #1.
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03-01-2017, 02:27 PM
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#10
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Montana Fan
Join Date: Mar 2004
Location: Bristol
Posts: 396
M.O.C. #1269
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My GMC doesn't have any visual aid to tell you when you are filling it and reach the full point.. Do other trucks have this or do you just kind of wait for the overflow?
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03-01-2017, 02:41 PM
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#11
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Montana Master
Join Date: May 2016
Location: Cuyahoga Falls
Posts: 698
M.O.C. #18572
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Quote:
Originally Posted by captbanjo
My GMC doesn't have any visual aid to tell you when you are filling it and reach the full point.. Do other trucks have this or do you just kind of wait for the overflow?
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You shouldn't be getting overflow. The DEF pumps at truck stops are designed to shut of just like the fuel pumps. If you are filling from a jug, be sure to use the nozzle provided. They are designed to stop the flow when full.
__________________
ATC/NAC Jerry A. Burkholder, USN (RET.)
Rule #1. The Chief is always right.
Rule #2. When in doubt, refer to rule #1.
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03-01-2017, 03:22 PM
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#12
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,134
M.O.C. #1920
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I always prefer to buy bulk at a truck stop. I figure that as much as they go through I never need to worry about the date. Plus, it's cheaper and easier to dispense. Just remember, at a lot of pumps when you prepay, you need to let them know you're getting Diesel and DEF.
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03-01-2017, 06:11 PM
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#13
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Montana Fan
Join Date: Jun 2011
Location: stockton
Posts: 405
M.O.C. #11457
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I carry 2 gallons of blue def on trips, keep it in the trailer storage compartment. I buy the one gallon containers, as I find the large containers hard to use under the hood without spilling the fluid. I never use the truck stop DEF - personal preference.
__________________
2014 Montana Mountaineer 331 RLT. Winneguard SWM Traveler Satellite Antenna, Progressive 50 amp portable EMS, 6 point Level Up.. 2016 Chevy 3500 Duramax Dually, long bed, B&W Patriot hitch.
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03-01-2017, 08:47 PM
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#14
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Montana Fan
Join Date: Dec 2016
Location: Lakewood, Wa.
Posts: 188
M.O.C. #19305
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My 2015 Chevy only lets you know when you are down to 30% full and then you get a notice probably good for about 200 miles worth after that. I think mine will go into Limp mode near empty, limiting top speed of 35 MPH.
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03-20-2017, 06:42 PM
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#15
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Established Member
Join Date: Mar 2017
Location: Thunder Bay
Posts: 20
M.O.C. #19503
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Quote:
Originally Posted by WeBeFulltime
This is how I do it and I use the Walmart brand. Cheaper and works just as good as any.
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Never buy at Wally World lol!!! Have Read many posts on the cummins forum about guys having major SCR issues due having ukowningly bought def jugs refillled with water by cheap idiots who think they are scamming 15 bucks...they buy it, dump in truck, fill with water and return for cash saying bought by mistake. Buy bulk at truck stops where they uses thousands of gallons a day at the pumps...or from a truck dealer where you get two to a sealed box...
__________________
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2010 3665RE
2017 3810MS
2016 Dodge Ram 6.7 Cummins, 6" BDS Lift on 37" Toyo MTs
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03-21-2017, 05:15 AM
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#16
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by Zak
Never buy at Wally World lol!!! Have Read many posts on the cummins forum about guys having major SCR issues due having ukowningly bought def jugs refillled with water by cheap idiots who think they are scamming 15 bucks...they buy it, dump in truck, fill with water and return for cash saying bought by mistake. Buy bulk at truck stops where they uses thousands of gallons a day at the pumps...or from a truck dealer where you get two to a sealed box...
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During my 20 years trucking I learned to remove the caps and check the factory seal on all containers of oil, DEF, etc. before paying for them. Not my first rodeo!
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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03-21-2017, 06:36 AM
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#17
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Montana Fan
Join Date: Jun 2015
Location: Livermore
Posts: 321
M.O.C. #17521
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I wait till my truck says I have 500 miles till it goes into limp mode. I have a 15 F250. I also went to the dealer and got there hose for the DEF. It locks into the hole better than the one that comes in the box. I find that my truck doesn't use that much DEF so when I need it I just go and get a box.
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03-21-2017, 06:40 AM
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#18
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Montana Fan
Join Date: Jun 2015
Location: owen sound
Posts: 491
M.O.C. #17566
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Only real issue is if it is too full when you hit the cold weather, the tank needs room for expansion if temp's are freezing, my 2015 diesel chevy used more DEF when it was new than it does now. Seems to average around 2000 - 4000kms to a tank when towing the 5er...
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03-21-2017, 08:47 AM
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#19
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Montana Master
Join Date: Sep 2014
Location: Full Timer In Naples, Florida
Posts: 1,049
M.O.C. #15731
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Quote:
Originally Posted by Zak
Never buy at Wally World lol!!! Have Read many posts on the cummins forum about guys having major SCR issues due having ukowningly bought def jugs refillled with water by cheap idiots who think they are scamming 15 bucks...they buy it, dump in truck, fill with water and return for cash saying bought by mistake. Buy bulk at truck stops where they uses thousands of gallons a day at the pumps...or from a truck dealer where you get two to a sealed box...
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I buy from Walmart and I make sure the box is sealed and the spout has the seal after i purchased it., I've never had any issues. Ether using blue def or Walmart brand.
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03-21-2017, 10:10 AM
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#20
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Montana Master
Join Date: Apr 2015
Location: Stafford Springs
Posts: 524
M.O.C. #17256
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Best price I have found on Blue DEF is at home depot.
__________________
Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
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