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+1 on the Royal Purple. Charles Navarro at LN recommends 5W40 over 0W40, due to it's stronger foundation. I've run 5W40 and 10W40 Royal Purple, as my car only sees warm weather. After reading all the current write-ups, I may go back to the 10W40, as the base oil is exponentially different from 0W, all the way to 10W.
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JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
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