2003 Merc 75HP 2 stroke - oil for mixture

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varnco

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Got a used motor that came with the boat, and it's my first time to refill the oil reservoir for the auto mix.

I'm leaning towards quicksilver brand, but should I go with synthetic or conventional?

Pros/Cons? Were motors in 2003 made to go with Synthetic?

I have no idea what's in it at the moment (synthetic or conventional)

Thanks!
 
I checked the manual and it recommends conventional, but if you want your engine to last longer, use the premium version, which I believe is a blend.

Thanks.
 

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