From what I've been told about Porsches and what I have experienced through my own Boxster is that these cars like to ran into higher RPMs. No that doesn't mean to redline it every through every gear. Just don't be afraid to open it up on a onramp or to have some fun in the twisties.
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-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house