Quote:
Originally Posted by rohrmann
DEF will have no impact on power or fuel mileage because it is injected into the exhaust stream just ahead of the catalytic converter, not into the engine. It works with the converter to reduce oxides of nitrogen in the exhaust.
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Not trying to be a S.A., but since that is the case, why can't I just use something like ammonia water (?) in the DEF tank ? I will continue to buy DEF at the truck stops - never had an issue - but just wondering .
Max