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01-19-2019, 05:57 PM
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#21
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Seasoned Camper
Join Date: Nov 2011
Location: Ringgold
Posts: 55
M.O.C. #11997
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Quote:
Originally Posted by ohiocamp
I have a 2018 Chevy Silverado 3500HD SRW and I use about a gallon every 500 miles towing a 3731FL.
ohiocamp
2018 3731FL
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The L5P motors use a lot more than the LML's did. The LML's used def at about 1 gallon def 100 gallons of diesel.
1 gallon of DEF for 50 gallons of diesel. I hope not, but I do know it drinks it.
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2018 Silverado 3500 DRW
2011 Montana Mountaineer 285RLD
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01-20-2019, 08:23 AM
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#22
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Montana Fan
Join Date: Dec 2017
Location: Sharpsburg
Posts: 203
M.O.C. #20974
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Tune and delete. No more DEF no more regen’s.
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2023 GMC 2500 HD AT4
2018 High Country 340BH
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01-20-2019, 10:47 AM
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#23
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Montana Master
Join Date: Nov 2018
Location: Menifee
Posts: 1,109
M.O.C. #22986
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Quote:
Originally Posted by Skw774
Tune and delete. No more DEF no more regen’s.
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dont do it if you live in California...smog check every 2 years, unless you want to detune and reinstall all that crap every 2 years. Ugh California
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01-20-2019, 12:12 PM
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#24
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Quote:
Originally Posted by Skw774
Tune and delete. No more DEF no more regen’s.
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Not a smart choice if you like to upgrade every 3-5 years!! Also if you live in an area that requires smog inspection for licensing purposes. Its not that I don't believe in the tuning and delete, its not financially feasible for a lot of us.
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Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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01-20-2019, 12:44 PM
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#25
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Montana Fan
Join Date: Dec 2017
Location: Sharpsburg
Posts: 203
M.O.C. #20974
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Understand. Here in Georgia we can and I keep my trucks a long time. It does help power fuel economy if you choose to do it.
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2023 GMC 2500 HD AT4
2018 High Country 340BH
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01-21-2019, 05:44 AM
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#26
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Montana Master
Join Date: Jan 2017
Location: home base IL, OTR anywhere
Posts: 542
M.O.C. #19382
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Quote:
Originally Posted by mazboy
here are some suggestions:
your truck will tell you when it is getting low so don't worry...you will have lots of miles--hundreds of miles.
secondly, when I fill up the def, any left over def i throwout. i was told to always us a fresh/new bottle of def. your system is very very sensitive to water and particles.
just in case, carry a fresh bottle of def with you.
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Just curious, if you filled your DEF tank and it gets consumed normally, would it not be the case that the airspace in the DEF tank would be the same environment as the airspace in the can of remaining DEF. Both would create the moisture you are referring to. Sounds to me like the person telling you to toss unused DEF is just trying to create demand for the product by getting unwitting buyers to toss the remaining DEF that will not fit into the DEF tank. The argument for carrying extra DEF is reasonable but tossing out the remaining unused def when you fill up sounds wacky.
Or am I missing something?
__________________
2017 RAM 3500 Laramie CCLB Dually CTD Aisin, OEM auto level rear air-ride, B&W hitch
2020 3813MS Legacy Cobalt FBP, MORryde 8K IS & pinbox, PI EMS,DIY mods by in-house "craftsman", RV security system Mk1 Beagle Alerter
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01-21-2019, 05:59 AM
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#27
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,898
M.O.C. #9561
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words from a diesel mechanic.... i'll go with what he says after it cost me nearly $1000 for a dirty def system.
just saying.
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01-21-2019, 10:23 AM
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#28
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Established Member
Join Date: Jan 2015
Location: Cameron
Posts: 38
M.O.C. #15936
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My 2017 high country Silverado shows instant mileage, along with the various settings for mileage over different lengths. Cruising along at 60-65 without head or tail winds I get 19-23. With my 5th wheel about 10-12. I get about 5000 miles on full def tank before system starts talking to me. When it tells I'm below 30% I pick up 5 gallons at next fuel stop and wait until it gets down to about 25% and then put in all 5 gallons with nothing left over.
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2015 Montana High Country 293RK.
2017 Chevy High Country 3500 SRW 4WD long bed diesel.
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01-21-2019, 11:54 AM
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#29
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Montana Master
Join Date: Jan 2018
Location: Granger TX
Posts: 2,597
M.O.C. #21044
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DEF delete
My diesel mechanic told me that if you delete - car dealers (at least new car dealers) won't take the truck in trade because they would have to put the DEF equipment back on before they could sell the vehicle legally. He also says he is getting fewer and fewer requests for deletes because DEF systems have improved since 2011-2012.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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01-21-2019, 03:21 PM
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#30
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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We had to sign documents stating that we have NOT altered the DEF/EGR system on our truck when we got rid of it, to a new car dealer. It stated we was responsible for any and all missing items of said system, and the cost to repair/replace them, if found we was untruthful. NOT worth the risk to me!
I will admit, IF I plan on keeping the truck I have for its entire life,I would NOT be opposed to doing a DEF/EGR delete and tuner upgrade on that particular truck!!!
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Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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01-23-2019, 06:18 AM
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#31
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,898
M.O.C. #9561
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As I mentioned earlier about using only new fresh def, here is an interesting video.
didn't know that there was an expiration date on DEF....interesting.
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01-23-2019, 09:19 AM
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#32
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Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
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Great video I did not know there is a short shelf life to DEF? Learn something every day.
__________________
Wayne and Ann Moore
2015 Ford F-350 King Ranch
Firestone air bags, bed saver.
Add 40 GAL tank in bed.
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01-23-2019, 09:37 AM
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#33
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 3,038
M.O.C. #5651
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DEF shelf life is 12 months if stored under 86 degrees. Up to 95 it is 6 months. so mainly just don't buy it and stick it somewhere hot for a few months. Most parts of the country don't stay over 85 for long, so I would think just don't buy it at a gas station that has it sitting out side in the heat.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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01-23-2019, 12:15 PM
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#34
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Wow I guess I need to get ice packs for my truck!! When I and traveling i burn through the DEF, but I can go months without have to refill fuel tank much less the DEF Tank. And in Texas no such thing as a cool place outside in the summer.
Will check to make sure I get the freshest DEF
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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01-23-2019, 01:22 PM
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#35
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New Member
Join Date: Feb 2016
Location: Calgary
Posts: 4
M.O.C. #18276
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Quote:
Originally Posted by MidMOTraveler
You’ll most likely fuel up on occasion at truck stops. They will have DEF at the pump, most convenient and way more economical than jugs. I just keep mine topped off.
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My advice, NEVER fill-up at a station that has DEF and Diesel at the pump. My neighbour (2016 F350 Lariat) did that, and the yahoo that delivers DEF and diesel contaminated the diesel supply. $16,000 later the fuel management system is repaired. Carry/Buy your own DEF supply, and only fill-up at stand alone pumps. In addition to saying that, use only national brands, Mobil, Chevron, Shell, BP. Likely more expensive, but if you're counting pennies per gallon, likely you should consider a different set-up. DEF is inexpensive. When hauling, (F350, 2016) I use ~ 4 gallons every 3-4,000 miles. When I'm not hauling, every 6-8,000 miles. Finally, the fuel, lubricants, additives (that the manufacturer recommends) are the life blood of your rig. Do not cheap out, you will come to regret it.
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01-23-2019, 02:44 PM
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#36
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Montana Fan
Join Date: Nov 2011
Location: Albany
Posts: 409
M.O.C. #11972
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My 2013 F-350 hits the 500 miles of DEF left point after about 3,500 miles of towing 14,100 lbs in various conditions. I always carry two 2.5 gallon containers of DEF when towing. Solo driving is about 7,000 miles until DEF hits the 500 miles left point.
__________________
2012 3150RL. G614 tires. Hardwired surge protector. Level-Up Hydraulic leveling.
2013 F-350 Lariat 6.7 PSD SRW SC LB 4X4 OEM hitch, air self-leveling on rear. 57-gallon replacement fuel tank. DieselSite water separator/fuel filter.
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01-23-2019, 03:30 PM
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#37
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Montana Master
Join Date: Oct 2017
Location: Trinidad, TX
Posts: 506
M.O.C. #20746
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You need to check the manufacture/blend date before purchasing. I do this all the time. As stated earlier, the life of the fluid is normally 1 year. So when you purchase it, make sure it is as fresh as possible. Here is an example of what I mean. Today, I went to Walmart and purchased a 2.5 gallon box of Peak Blue Def. There is a code stamped somewhere on the box. My code was 122035133271. By breaking the code down, you can tell when this batch was produced. Here is how you can do that:
First 2 digits is the plant code. So mine was 12.
The next 2 digits tell me the year it expires. However, in order to tell when it was made you have to subtract 1. Since my code said 20 and I subtract 1 that gives me 19 for 2019.
The next 3 digits represent a Julian day which is better known as the day of the year it expires. However, you will need to subtract the stamped 3 digit code from 365 to determine the day it was made. Since my code said 351 and I subtract 351 from 365, that gives me 14. The 14th day of the year is Jan 14.
This simply means that the manufacture/blend date for the box I bought was Jan 14, 2019. As of this posting that was 9 days ago so I'd say that is pretty fresh.
The remaining numbers is a batch number and does not play a part in determining the fluid's age.
I hope this helps.
__________________
2018 Ram 3500 Laramie Longhorn 4X4 Dually Cummins Aisin CC LB / B&W Companion hitch
50 Gallon Transfer Flow in bed tank w/ Trax 3
2018 Montana 3121RL
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01-23-2019, 03:53 PM
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#38
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Quote:
Originally Posted by Motorman409
My advice, NEVER fill-up at a station that has DEF and Diesel at the pump. My neighbour (2016 F350 Lariat) did that, and the yahoo that delivers DEF and diesel contaminated the diesel supply. $16,000 later the fuel management system is repaired.
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Had they had contamination of the fuel supply, there would have been multiple Semis broke down with 100 miles of that fuel stop with the same issue. It wouldn't been hard to trace it back to that supplier either!!! Vandalism sounds a little more plausible to me then contaminated fuel supply at a fuel stop.
Ive been running DEF in my semis since 2006,without issue in the last 10 years, and I get it right from a pump. I also get it from a pump for our tow vehicles we have had in the last 8 years too.
__________________
Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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01-23-2019, 03:56 PM
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#39
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Ya` all are worrying WAY TOO MUCH over this !!!
__________________
Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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01-23-2019, 03:57 PM
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#40
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Montana Fan
Join Date: May 2018
Location: san andreas
Posts: 209
M.O.C. #21805
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i am lucky as my truck does not need to burn money away in this.
but be very careful about the age of the def fluid you buy, as old or contaminated def will wreck your def $y$tem co$ting you thou$and$ of dollar$ in damage$.
learn how to read the labels on the containers, and only buy the fresh stuff. just like buying milk, only the freshest will do. never use old def. or from a opened container.
at my job we get a def delivery each week (sometimes twice a week) for this stuff. so we always have the freshest to pump into the rigs.
the trucks do not burn much, i do not know the cap of the def tanks, but in a good 500 miles less than a third (maybe less than a quarter) of a tank of def is used.
as a driver i do not fuel up the trucks, so that info is not at hand to me.
so buy fresh only as needed, like every couple weeks? pending on how many miles you drive, might say a gallon a month?? if low miles.
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