Lower motor unit oil question

[mfoley312]

Hi all,

 

I have a 2 stroke 50 hp Mercury outboard that I'm changing the lower unit oil in within the next few weekends before taking it out again.

 

I have 0.5 quart left from last year and my question is, is it okay to use this same quart or does this oil go bad?

 

On the same note I have some left over marine grade grease that I used for the wheel bearings last year. Can I use this again as well?

 

Thank you guys!

P.s. this is my 2nd year with the boat so I'm still new

[Way north bass guy]

As long as it’s been stored properly, it should be just fine. I often have leftover gear oil that gets used the following year and I’ve never had any issues. Only thing I could see that could be bad would be if it was stored in a cold shed or garage that froze and thawed a bunch, leading to condensation being added into the mix. 

[lo n slo]

i’m no expert but i’ve always saved partial bottles for next year, same goes for the grease.

[mfoley312]

Thanks guys!!

[bassfisher444]

As long as you left the cap on it there is no problem at all. 

[TnRiver46]

It should be fine on both fronts