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Discussion Starter · #1 ·
Hey Tohatsu MFS guys, what do use for lower unit oil? Mine’s a 2017 and the manual says:

“Genuine Gear Oil or API GL5, SAE #80-90”

I bought some premium quicksilver 80W-90, but I noticed when I got home the API is GL4. With that, I started looking for GL5 in 80W-90 and I’m having a hard time finding that combo.

Can someone point me to a product that is API GL5 and 80W-90?


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