I am certainly no expert, but I would put money on an oil change to a different weight, such as 5W40 or 10W40, will solve your issues. 0W40 is too thin, let alone 5W30. I've run 10W40 Castrol Syntec for the last few years and 5W40 Royal Purple before that...no ticking from my lifters.
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JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
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