Lower unit oil question

[Arrowhead572]

I have a 1991 Four Winns with a 5.7L engine and OMC I/O. I'm the 3rd owner and only have 320 hrs on it, 210 of which I put on it. The closest boat dealer is a 250 mile RT so I called NAPA, meaning to buy some Sierra Outdrive lube with a GL-5 rating per the manual. They had some Mercruiser Quick Silver lube so I thought, it should work. After reading the fine print on the container, it doesn't say anywhere that it meets a GL-5 spec. I don't want to screw it up so should I take it back and get a GL-5 rated lube?

 

[Gary H NC]

Re: Lower unit oil question

That drive calls for OMC Hi-Vis that is no longer made.
What you bought will work though,or exchange it for Mobile 1 GL-5 synthetic..
You will get so many opinions on gear lube....
Everyone has a favorite...