Another data point on Porsche oil:
The only Porsche dealership, Niello, in our metro area of 2 million people services a lot of Porsches of all types. I took my "new" Boxster in for an oil change knowing they would search the car for anything broken or worn out so they could propose repairs. I was surprised they used Mobil 1, 0-40W on my 100K-miles car. When I questioned the wisdom of this choice, the service manager said that was what they use on every Porsche, new, low-miles, or old, high miles. They've been doing this since 1981 and claim "no problems."
0-40W is not what I'd have selected, but on the other hand, I haven't noticed any camshaft chain noise or valve clatter at start-up.
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2004 Boxster S
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