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Manual Transmission Oil


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Got a 2010 Cayman S Gen 2 and I want to change the gearbox oil as the car is about to turn 50k so as good a time as any for some nice fresh oil.


Which oil is recommended?  Some say that any 75w-90 fully synthetic will do but I've also read that Porsche use Mobil 1 or Shell Spirex.  Think it has to be GL-5 as well....confusing !


Anyone got any recommendations/advice?





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I've always used Motul gearbox oil, for the Cayman you want 75/90 GL5, you're unlikely to find the factory spec GL4+GL5.  


If if you have an LSD(?) then consider a friction additive.


You won't notice a difference in changing the gearbox oil in these cars especially if you're changing the oil way before the recommended 120k miles.  No harm in doing it at all though. 


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Mmmm, not sure about the LSD.


This the is OEM fluid - http://type911shop.co.uk/epages/de867ca1-377e-432e-84fd-bdccf2206766.sf/en_GB/?ObjectPath=/Shops/de867ca1-377e-432e-84fd-bdccf2206766/Products/7834


Is there anything special about this or is it just Mobile 1 75w90? 


Just wondering if I can put any 75w90 GL5 gear oil.  The americans like the Redline stuff but I've always used Silkolene.  Looking at this - http://www.opieoils.co.uk/p-850-silkolene-silktran-syn-5-75w-90-fully-synthetic-gear-oil-now-fuchs-titan-race-syn-5-75w-90.aspx



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