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Old 06-06-2018, 04:32 PM   #1
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Seneca DEF

I'd like to hear how much DEF your using in your Seneca. I'm seeing about a gallon for every 500 miles.

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Old 06-06-2018, 04:41 PM   #2
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I'd like to hear how much DEF your using in your Seneca. I'm seeing about a gallon for every 500 miles.

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About the same...
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Old 06-06-2018, 05:40 PM   #3
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About the same...
Closer to 400 miles always towing 7000 lbs in the west. Mostly off freeway. 2014 37ts.
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Old 06-06-2018, 07:14 PM   #4
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About the same on mine.
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Old 06-07-2018, 05:17 AM   #5
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401.288 mpDEFg
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Old 06-07-2018, 06:20 AM   #6
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About the same. Always fill at Love's, back in the truck fueling area. Good price and easy to fill. I'm sure its a little more, but I work on the one gallon per light on the dash and always plan to fill when 2 lights are out. 50,000 miles in 3 years and going strong.
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Old 06-07-2018, 11:59 AM   #7
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Def

Just did 2200 mile trip with car trailer and needed 5 2.5 gal boxes. I fear the DEF at the pump could be old so I buy boxes at Sams; what do you all do?
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Old 06-07-2018, 12:55 PM   #8
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Just did 2200 mile trip with car trailer and needed 5 2.5 gal boxes. I fear the DEF at the pump could be old so I buy boxes at Sams; what do you all do?
My thinking is that with all the trucks needing DEF at truck stops, it should be pretty fresh. And it sure is convenient.
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Old 06-08-2018, 06:24 AM   #9
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My thinking is that with all the trucks needing DEF at truck stops, it should be pretty fresh. And it sure is convenient.
Ditto! Exactly why we only buy at Love's truck stops.
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Old 06-08-2018, 06:33 AM   #10
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Under load using a gallon every 3-500 depending is completely normal. It’s dependent on engine load so when you hear about trucks only needing DEF every 3-4 thousand miles it’s because they’re not running them hard.
I always try and buy at the pump, usually at truck stops, as it’s being turned over on a regular basis. In the box - get a DEF checker and make sure it’s fresh before you put it in your tank if there is any question.
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