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GL1800 Oil, HP4 to GN4?

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I recently purchased an 2001 1800 Wing with 25000 miles that has used nothing but Honda HP4. Is it necessary to stick with this or can I switch to the Honda GN4. Could this damage the engine?
Thanks
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It's OK to switch oil to a different brand or part number at anytime. As long as it is the right weight oil for the engine.

Welcome:waving:jlsdcen2
I don't see
any problems with
the change.
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