You really need to drive diesel and 3.0 one after the other.

genemish and I drove the diesel, and then 4.8, and 4.8 is just faaaaaaaster. Ignore all youtube reviews of how diesel is faster from the start - that is all BS.

In your case I am not sure whether 3.0 is going to be different from 3.5d... Diesel has that small 0.5 sec lag ... it DOES !

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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