Thanks bigx5er, much appreciated an honest opinion and review of your experience!

In my area in North/Central NJ, diesel seems to run about the same as premium, and somewhat easily available. I am going to try to see if I can find a web site listing all diesel-selling gas stations.

Some people did get the low DEF warning message, BUT DID ANYONE YET TO STALL/NOT ABLE TO START THE ENGINE due to this false positive error message? That is the real question!

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His : 2013 X5 3.5d Deep Sea Blue/Black/Aluminum with ALL packages, 20" 214"s, running boards, Adaptive Drive, Spare Tire, BMW Apps
On Order : 2016 X3 3.5 MSport Silver/Mocha with DHP, CW, Prem, Tech, DA, Lighting

Hers : 2015 328xi MSport Silver/Red

Prior:
2008 X5 4.8
2011 X5 3.5d
2010 335 xDrive
2013 335 xDrive