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Wally World puts lots of information on their DEF containers, don't know if it is required by the Feds or not. Here are a few examples...Batch #, date produced, composition of ingredients ....water 67.5% and Urea 32.5%, and a DEF consumption chart. This chart shows how many miles you get out of a gallon of DEF based on MPG and consumption rate of DEF, (1%, 2% or 3%).
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