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Old 08-01-2011, 11:49 AM   #11
stephen wilson
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Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
Well, you're going to get some EXTREMELY varied opinions.
Most '05 987's have the same IMS as an '04, and thus CAN be replaced without tearing down the engine. It's completely unknown whether the IMS update in ~'06 was an improvement or not. I doubt there is any benefit to changing the oil more frequently than every 5k, or annually, whichever comes first.
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