Quote:
Originally Posted by H.F.944
Just pay attention to ..."Note: The engine oils ...can also be unrestrictedly used retroactively for all 4, 6, and 8-cylinder Porsche engines from model year 1973 onwards."...

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Uh huh, and if you read the newest Porsche TSB it says we can use 0w40....
http://www.pcarworkshop.com/images/1/1c/1701_2003_10103usgeolab.pdf
That's NOT the newest TSB, regardless...