Diesel Place : Chevrolet and GMC Diesel Truck Forums - View Single Post - What kind of hwy mileage are people getting?
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Old 04-09-2019, 12:00 PM   #65 (permalink)
Mikey52
Clutch
 
Join Date: Aug 2018
Posts: 59

Def consumption is a % of fuel used. If you use 100 gallons of fuel, you will use 1-1.5 gallons of def. So when towing, with lower miles per gallon, will yield more def use per mile.
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