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C 40 oil for 718 GT4

  • 2020
  • 718 Cayman GT4
Fernandina Beach, 

I have a 2021 718 GT4 on order with an expected delivery in Dec.  I have read that the new 4 litre engines require C40 motor oil rather than the A40 oil most other Porsches use.  I understand the reason for the new oil are the new filters in the exhaust system.  I have also read that these new filters are somewhat de-activated in the U.S. cars and some have speculated that due to this the A40 oil can be used.  From what I understand the new oils are not compatable, meaning you can't use A40 to top off a car that uses C40.  Can you address this - whether all cars with the new 4 litre engine must use C40?  Also, if we need to use C40 can you advise where to get it as auto parts stores I have asked about this say they can't get it.


Ken Husler

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