Does this sound like normal def fluid usage?
In the last 10k miles i have filled the truck with 4 gallons of def fluid. The first three times i used the 1/2 gallon bottles from dealer three different times after light to add def fluid came on. The most recent time the light came on i wated until the warning dropped to about 350 miles left b4 empty and used the entire 2.5 gallons jug i purchased online.
I would estimate that in the last 4k mikes i have used at least one gallon of def per 1k miles.
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