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So I just picked up a 02 RC51 and I notice Honda says to run HP4 oil, which I believe is conventional oil.
Do any of you run 20-50 full synthetic oil in the heat of the summer?
Speed Safe馃憡
 

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Always run full synthetic. Oil is the life blood of any engine.
10W30 in cooler conditions/winter. 10W40 in warmer conditions/summer. 20W50 is for air-cooled engines.
"Run the best, with no regrets."
 
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