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M1 is on the Porsche list in both 5W and 0W-40. And I think at least one 50. Good luck trying to find 5W-40 in the US.
And the Motul X-Cess's SL rating is as low as you would want to go.
Of the not-recommended oils, I bought Motul 300V from Charles after much research and careful consideration. Yes, it is very expensive.
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Mike
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970
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