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<p>[QUOTE=&quot;JB7, post: 12371086, member: 339737&quot;]Engine, mileage, any codes or lights on? What was the usage before, what is it now? Usage should be about 3%, so 3 gallons of DEF for every 100 gallons of fuel. Heavy loads and temp can affect usage. Look for fluid leaks; crystals around the SCR or doser; cracks in the SCR near the doser; exhaust leaks from the turbo to the SCR; remove and inspect the doser.[/QUOTE]</p><p><br /></p>

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