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Mobil 1
Porsche recommends Mobil 1 Synthetic 0w-40.
Mobil One 0w-40
Porsche recommends the use of Mobil 1 synthetic 0-40 weight.
The 2008 Porsche Cayman has double overhead cam (DOHC).
The 2008 Porsche Cayenne has double overhead cam (DOHC).
The 2008 Porsche Boxster has double overhead cam (DOHC).
The 2008 Porsche 911 has double overhead cam (DOHC).
mobil 1 - OW-40.
Porsche recommends using Mobile 1 oil, specifically 0W-40.
10w 40
The 2003 911 C4S takes about 9L of Ow40.