I prefer to listen to Jake Raby, Charles Navarro and JFP in PA...I don't trust the factory recommendations, as they are obscured by marketing deals.
My engine is healthy and there's no clatter at startup, like it did when it was running M1 0W40. Thank goodness it only saw 8k miles before I made changes.
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JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
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