Trying to change the lower unit oil on my 85horse Force outboard. Seloc manual says use quality SAE 90W hypoid gear oil. My local wal-mart is about the only place I have to buy this stuff, and this is what they have:<br /><br />"Super Tech 80W-90 GL-5 gear lubricant.<br />Multipurpose, extreme pressure (EP) gear lubricant to be used where API GL-5 lubricants are recommended for makeup or refill of manual shift transmissions, conventional differentials, rear axles and steering gear boxes as found in passenger cars, trucks and farm tractors. CAn be used for makeup of limited slip/positive traction rear axles. Protects against rust, foam, high temperature and corrosion of copper or bronze bushings.<br />Recommend where API GL-5, API MT-1, MIL-PRF-2105E or MACK GO-J are specified."<br /><br />1. Now, it doesn't say anything about hypoid, but my understanding is that hypoid describes the type of gear, and hypoid gears really just require an extreme pressure oil (EP), which it does say. Is this ok?<br />2. It also doesn't say anything about marine, but does this matter? Oil is oil right? It's all water resistant by necessity, yeah?<br />3. I checked at an autozone, and they had a similar oil that said it was hypoid, but also not specified as marine. Would this be better?<br /><br />I definitely don't want to put in the wrong oil. Somebody who really knows oil, please clue me in. Should I just order some oil on the internet or will what I have work just fine?
