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  #1  
Old 12-08-2014, 09:41 PM
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DEF Usage

What is the norm for DEF usage?

I'm at 800 miles (70% hwy) and the gauge still reads 100%.

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  #2  
Old 12-08-2014, 10:05 PM
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Re: DEF Usage

I'm averaging 1 gallon to every 800-1100 miles.


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Old 12-08-2014, 10:06 PM
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Re: DEF Usage

Thanks!! I'll hold off until 1500 miles and if the gauge doesn't move... i'll just drive it till it breaks..
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Old 12-08-2014, 10:28 PM
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Re: DEF Usage

Once it drops down - don't ever fill it full again. It's much easier to manage the usage when the gauge reads ¾ or less - at least from my personal experience.


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Old 12-08-2014, 10:35 PM
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Re: DEF Usage

This question was raised once before and I realized that some individuals thought the actual number changed on the DEF gauge. The digital gauge will always read the 0 and 100% but only the digital bar will move but there will be no change in the actual number. I thought this was strange because in other vehicles with DEF gauges that I have been in all had an actual number/percentage that reflected the real time level. I just recently turned 5,000 miles and the DEF gauge/bar reflected that I had only used about 1/4 of the fluid which was filled at the dealer when I bought it. I topped my tank of with a 2.5 gallon jug of Mopar DEF and the bar on the gauge showed it was full when I restarted the Jeep. I would estimate that 80% of the miles are from highway 70mph or more driving. Hope that helps you out.
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Old 12-09-2014, 04:16 PM
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Re: DEF Usage

I have to agree with the above poster-is absolutely correct. The bargraph is the only thing that moves, the numbers indicate either 0% or 100%. Each one of the clicks on the bargraph is roughly 2 gallons.


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Old 12-09-2014, 04:51 PM
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Re: DEF Usage

ImageUploadedByJeepGarage1418165490.538288.jpg


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Old 12-09-2014, 06:01 PM
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Re: DEF Usage

In 14000 miles, I've used 10 gallons of Def (half full at delivery)
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Old 12-09-2014, 07:10 PM
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Re: DEF Usage

Thanks TinMan... I guess I was just expecting to use a little by now...
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Old 12-10-2014, 02:24 AM
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Re: DEF Usage

Quote:
Originally Posted by Jason911 View Post
Once it drops down - don't ever fill it full again. It's much easier to manage the usage when the gauge reads ¾ or less - at least from my personal experience.
I concur. Given that I use about 1 tank per year, I am planning to keep mine between 25 and 50% from now on to reduce the average age of the DEF in my tank.

Also, given that this isn't fact in the manual, I feel compelled to mention in these threads that due to the weird ultrasonic sensor, it is important to always add at least 1 gallon when refilling the DEF tank.
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