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DEF Fluid

Discussion in 'General Discussions' started by Steve Pencka, Jun 28, 2020.

  1. Steve Pencka

    Steve Pencka Junior Member

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    Hey there!!

    I just bought a new Ram 2019 3500 Limited, Ive had it a little over a week now. Couple questions for you more experienced folks!

    This is my first diesel - purchased mainly for pulling an RV from Seattle area to Central Florida in a couple months.

    My DEF indicator shows about 1/2 - first 1/2 of what? The tank volume is 1/2 empty? How much does it hold? What kind/brand of DEF do I need to purchase and where can I get it? I don't want to buy something cheap or that will do damage, but I don't want to spend an arm and a leg either, for liquid gold. I just want a good quality fluid. What do y'all recommend?

    Next question - My RAM has the new large screen (U-connect) in the dash. I had a hell of a time getting Sirius radio initiated on this truck. I spent several hours and talked to multiple support people at Sirius with no luck! The last guy finally sounded as if he had given up and he told me that this is a known RAM issue with Sirius and the new U-Connect system. Has anyone else here had a similar experience? Immediately after I hung with this last Virus guy, I googles searched and it does appear I want the only one that had this issue.

    Yes, I said had! A few hours later, I went out to the truck to "play" with it. Lo and behold it started working for me!

    Finally - I bought a new BakFlip Tonneau cover - its a 6.5' bed with Megacab. I went to kick out the step - it was gone!!! Its on my window sticker as being part of the package. Gotta tell ya, I was pissed after all this crap happening to me. I immediately drove to the dealer - and was told all of these steps had been removed and are going to be recalled when a fix is delivered. Has anyone else encountered this issue??? Seems my salesman "forgot" to mention this.

    Gotta say, after all this crap, I was soured on RAM. I hope my feelings change in time!!

    Thanks for any comments!!
    Steve
     
  2. WY-Dave

    WY-Dave Senior Member Military

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    If it is the same as my '18, the tank is 5.5gal. The jugs come in 2.5g, so when at half add a jug and you won't overfill. I have heard of error code issues if filled to the brim. I have been using the Wally version for a year and a half and without any issues. The Diesel Supplement brochure that came with the truck has it all in it. Right now the brochures/manuals download on the Ram Truck site is not working.
     
  3. tjfdesmo

    tjfdesmo Senior Member

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    Unlike many items DEF is DEF. It is 32.5% urea, and 67.5% deionized water. There are no additive packages, or custom formulations to justify spending more for a brand in a fancy box. Make sure the bottle is sealed, and check the date code. It does degrade with age, and that rate varies based on temperature. Some have an easy to read date code, and many use some asinine reverse julian crap to confuse you, so learn how the system works to protect yourself.

    I have used mostly Supertech from Wally World at $7.88/2.5 gal jug, or from the truck pumps when traveling with the toy hauler.
     
    BossHogg and crash68 like this.
  4. Steve Pencka

    Steve Pencka Junior Member

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    First, thanks for the replies!! So, it doesn't sound as if I'd want to Puy on Amazon, since I have no idea of the date. So.... where does that leave me? Wa'Mart, Target, Auto Parts stores, where I suspect you'd pay more. Just wondering??

    Thanks Again!!
     
  5. star_deceiver

    star_deceiver Senior Member

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    Go to Walmart, one on the interstate. They will have a giant pallet in the automotive section with stacks of DEF jugs for $8. Dump it in when the level is below half.

    Done
     
  6. WY-Dave

    WY-Dave Senior Member Military

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    And as a FYI form Cummings

    https://www.cumminsfiltration.com/sites/default/files/MB10033.pdf


    Q. What is the shelf life of DEF?

    A. The shelf life of DEF is a function of ambient storage temperature. DEF will degrade over time depending on temperature and exposure to sun light. Expectations for shelf life as defined by ISO Spec 22241-3 are the minimum expectations for shelf life when stored at constant temperatures. If stored between 10 and 90 deg F, shelf life will easily be one year. If the maximum temperature does not exceed approximately 75 deg F for an extended period of time, the shelf life will be two years.
     
  7. Gr8bawana

    Gr8bawana Senior Member

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    I have run the DEF down to where the needle is on the red mark and after I pour in a 2.5 gal jug the gauge shows 3/4 full.
    I've only added DEF a few times and only used the walmart $7.88 cheap stuff and have had zero problems. It sure beats $12.00+ for the name brand stuff.
     
  8. TMyers

    TMyers USMC 84' - 92' Military

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    If you are soured with your new RAM, hook it up to your trailer and feel the torque from that Cummins! You'll feel better real quick. As for DEF, Walmart or a Truck Stop is where I get mine. Also, don't be alarmed about the amount your truck uses. If you are not towing, you'll think the gauge is broken because you'll hardly use any. And lastly, I think my truck holds 7 gallons of DEF. When my gauge shows 1/4 tank, I buy two boxes from Walmart and it holds both.
     
  9. OLEJOE

    OLEJOE Member

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    I’ve got 8100 miles on my 2500 and I’ve only added 2.5 gallons of DEF since I bought it. But I’ve only towed with it 1300 miles. It had about 3/4 tank when I got it and added the 2.5 gallons when it got to 1/4 tank and it filled it up. I used the bulk tank at a Pilot TS and no problem yet but I have a box of the Blue DEF for next time and it will be shortly.
     
  10. Summit1

    Summit1 Member

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    From the time I first bought my 2017 CTD, I kept the DEF full, as I did not know how long the ~5.5 gallons would last under various conditions. After a plugged DEF injector problem (not only was it a zero problem, but also a one problem, as it sent a bunch of errant zeroes and ones to the system, displaying an error code). Now, on the advice of the Diesel wizard at the dealership, I let the DEF level drop to ~1/4 and then add a 2.5 gallon jug of fresh DEF.
     

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