workingonit,
Here are pics of fuel trim readings. Short term trims stayed the same from cold start up to full temp. Almost 0. The long term fuel trims stayed almost the same. -3.0/-2.4 ended up at -3.7 for both front and rear cylinders. -3.0 trims align with a 3.0 L engine. Average city MPG is between 15-16 on consumer1 readings. For highway driving 75 MPH - 23-25 MPG. The best recorded MPG is 24.3 on an actual fill up.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)