I always put 8.5 qts in / oil change and then watch it get sucked up into the CCV system at a rate of approx 1500-2000 miles / qt.

I am going to be installing a catch can once the weather warms up to get some very accurate figures ( and prevent the oil from being burnt )

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2006 X5 48is Black / Black - LED AEs - FCAB - GAS 1.2bar cap