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The approved list on the TSB does not have one 30 weight. There are 0W-40, 5W-40, and 5W-50 weights approved for worldwide or USA/Canada.
Most are Mobil 1, but there are four Total Quartz and Activa oils, including a 5W-40 diesel oil.
I'm going back to 5W-40 when I change my oil and filter next month. Probably will go with the LN adapter for spin on filters.
By the way, the approvals have expiration dates, tho manufacturers can request and sometimes receive extensions. Two M1s expire late this year.
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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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