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@Domm - if you didn't check the oil level before why do you think it has dropped?

Yes the 3.0TFSI can "use" oil and if it does it usually points to a faulty PCV. Does the oil filler cap come off easily or is there vacuum holding it down?
 

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I too would assume that after the oil change the reading would have been 100% but without knowing for sure you are just guessing.
 
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