Honda oil spec in the US vs everywhere else

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Seems like if the bearing clearances are tight enough (Honda, generally pretty good), and the HTHS is high enough to protect the bearings at operating temps, there’s nothing inherently bad about a quality, name brand, full synthetic 0W20 in an engine designed for it. Now, if it’s a track day, maybe some of that uber-thick 5W30 might be in order!
 
This topic is not unique to Hondas; the same conversation has taken place regarding many OEMs.
Meaning there's plenty of info and discussion already present on this site.
OP - please use the search tool, first read and then if you have specific questions that have not already been covered, go ahead and ask follow up Qs.

Locked because this thread is more about egos than the topic.
 
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