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Eating too much DEF

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Old Feb 27, 2018 | 03:47 PM
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1011hans
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Eating too much DEF
Just took a trip to Yuma AZ from Spokane Wa towing a 33foot 5th wheel. I went through about 18 gallons of DEF in 3500 miles. So far two dealers are indicating nothing is wrong. Anybody out there have this problem? 2017 F350 Super Duty. Now has 10k miles.
 
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Old Feb 27, 2018 | 04:38 PM
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I go through about a bit more than a gallon every 1,000 miles and about 75% of those miles were towing a trailer that weighs 11K. Your DEF usage sounds high.
 
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Old Feb 27, 2018 | 06:21 PM
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Yup, towing 8k this fall and 3500 miles went though 15 gal.
 
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