I would think a big decider would be how you are driving your Box and how often you are changing the oil? Mobile 1 is just fine - but you will want to make sure you do regular oil changes. If you are going to push the motor (kind of the point of a porsche) then you might want to look at something a bit hardier. But for just running around, Mobile is fine.
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2011 Boxster 987.2 Arctic silver / Black leather, PDK with Sports Chrono Package Plus
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