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Old 07-17-2006, 09:13 AM   #9
UKBXSTR
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Join Date: Mar 2004
Location: Chester, England
Posts: 87
Porsche approved oils TSB attached - for what its worth some Porsche specialists in the UK say Mobil 1 is too thin and is partly to blame for some RMS issues. Moving to 5w40 or 10w40 seems to cure recurring RMS on some cars.
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