Take it for a drive. About 10 miles. Reason for this is Eng maybe at operating temp but the oil is not. This should be long enough for the engine oil to reach normal operating temp.
Park the car at level ground and wait a few minutes than check the level.
When I change my oil I normally start with 8 quarts or less. Drive the car till it reaches normal operating temp and top off from there.
Be very careful as you already have 9 qts there. A lot of AOS issues results from overfilling.
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2008 Boxster S PDE2
02 Boxster S Blk on Blk(Stock for the Wife)
88 turbo S (My Toy) slightly modified
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