I bought my car very recently and it came with some old paperwork. I know in the past it has been on Mobile One so for that reason I am just going to stick with Mobile One. Some of the replies mention Porsche now recommends a diff viscosity.....so thats my last desision....0W 40.....or 5W 50 ....not sure if M1 makes 5/50 or not. So ya...I havent got around to changing the oil yet. Just did the cigarette lighter conversion today. Have to replace the starter next I believe.
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