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Like said some oil on intake side (from CCV and turbo) is totally normal. If there is no abnormal oil consumption everything is likely as it should. The older loo roll type oil separator is a bit more efficient compared to newer vortex but the difference is not huge and it would need regular renewing.
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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey
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