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Old Aug 21, 2023 | 05:08 PM
  #16  
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I fill up at truck stops. 10 cents off a gallon of diesel and 3.79 cents a gallon for DEF. $32 for 8 gallons of DEF at Love's
 
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Old Aug 23, 2023 | 05:54 PM
  #17  
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How old is too old DEF? Is there a shelf life?
 
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Old Aug 23, 2023 | 06:16 PM
  #18  
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Originally Posted by Smurf830
How old is too old DEF? Is there a shelf life?
Shpuld be 1-3 years.Temperature can have a big effect on that. The hotter the temps, the lower the shelf life.

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Old Aug 23, 2023 | 06:19 PM
  #19  
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used it in my 2016 for 5 years with no issues.
 
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Old Aug 23, 2023 | 07:12 PM
  #20  
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walmart def on two trucks 200k no def issuse except for a recall on the def heater when i lived in San Diego
 
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Old Aug 23, 2023 | 08:15 PM
  #21  
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I personally will buy my Peak Blue DEF from Costco.
 
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Old Aug 24, 2023 | 12:53 PM
  #22  
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I've used SuperTech DEF every time except for maybe two or three tanks I've gotten from the pump while traveling. 2022 F-250 with about 14K on the clock. No issues.

 
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Old Aug 24, 2023 | 12:58 PM
  #23  
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Originally Posted by jr_nicholson
I fill up at truck stops. 10 cents off a gallon of diesel and 3.79 cents a gallon for DEF. $32 for 8 gallons of DEF at Love's
Same here. I don't know of any benefit from using any ultra-super DEF.
 
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Old Aug 24, 2023 | 02:40 PM
  #24  
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Have never lifted a jug of the stuff, always filled it at the truck stops, after wiping the pump off. Cost less at the pump and doesn't take up any room.
 
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