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Discussion Starter #1
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

Premium Member
6,480 Posts
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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