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My 2014 RK: Syn3 in the engine and Formula+ in the primary and transmission. You can use the search function for "oil" and you will be reading all night.
agree....please read the oil thread and do a search on this thread. there are more than enough comments to keep you reading for a month.
Personally, I signed up for preferred customer through Amsoil and buy a case of 20w50 oil and use that. Everyone has their own preference....just use quality products and follow recommended changes.
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