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I use 15W-50 Aeroshell Semi-synthetic, but my Bayou 220 only is used in the summer, it is specifically made for air-cooled engines. I would not use a full synthetic unless it was a motorcycle oil, if an automotive full synthetic is used it could ruin the wet clutches. The final answer: Any good motorcycle oil in 10W-40 will work fine.

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15y ago

What else can I help you with?