944 man
Active member
ORIGINAL: Copperman05
Porsche do not recommend 0w-40 in these engines, they do however suggest 5w-40 synthetic for year round use in my 1988 manual.
But I think we have been there before[].
Edd
I now have that manual: Porsche corrected themselves in subsequent manuals, I believe (reverting to 10W-).