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Thread: DEF Usage?
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Old 11-14-2012, 04:38 PM
firstbimmer firstbimmer is offline
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Location: North Bay, CA
Join Date: May 2006
Posts: 419
Mein Auto: 335d
Originally Posted by taibanl View Post
You were underfilled
Yes I was. At service, just under 6 gallons were added. And my 'add fluid' warning came on a second time right before my service.

The amount added would lead me to believe that I don't have any transfer problems between the active and passive tanks, since both tanks would need to be empty for that much fill to be used. This is a relief, but I still am of the opinion that my DEF usage has increased since the first ECU reflash. It seems to have increased to the point that I no longer can make it without a refill between oil changes.

At least its just having to buy DEF fluid instead of having to deal with a faulty system. Annoyance but not a problem.
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