Oil Storage

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Oil Storage

Postby cordale » Mon Dec 11, 2017 2:16 pm

Does engine oil and gear lube remain good when stored in a non-heated garage during winter months?

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Re: Oil Storage

Postby SGilbert » Mon Dec 11, 2017 2:55 pm

Always keep my oils stored in the garage. (Admiral says no to linen closet)
Never had a problem.
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Re: Oil Storage

Postby cbsmith » Mon Dec 11, 2017 3:20 pm

As long as they are sealed unopened bottles it should be fine. If they are open and only partially full there is a chance condensation could build up in the bottle with temperature changes.
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Re: Oil Storage

Postby steve & dot » Mon Dec 11, 2017 9:44 pm

Your oil will be fine. They keep that stuff in trucks, unheated warehouses, rail cars and storage tanks all over. No worries.
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Re: Oil Storage

Postby Chris_in_Texas » Tue Dec 12, 2017 12:10 am

Any condensation would simply boil out of the oil as well once the engine is run. Just like autos sit around as well as boats in the cold damp air, and condensation in the engine blocks.
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Re: Oil Storage

Postby cbsmith » Tue Dec 12, 2017 5:46 am

Chris_in_Texas wrote:Any condensation would simply boil out of the oil as well once the engine is run. Just like autos sit around as well as boats in the cold damp air, and condensation in the engine blocks.


In th engine it will boil out and isn’t a problem. But gear lube doesn’t get up to a boiling temperature I don’t believe. The outdrive is almost full of lube, there isn’t as much open space as there is inside an engine block, so moisture won’t build up as much.

In the end it is probably all minimal anyway.
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Re: Oil Storage

Postby gofast24 » Tue Dec 12, 2017 12:34 pm

cbsmith wrote:
Chris_in_Texas wrote:Any condensation would simply boil out of the oil as well once the engine is run. Just like autos sit around as well as boats in the cold damp air, and condensation in the engine blocks.


In th engine it will boil out and isn’t a problem. But gear lube doesn’t get up to a boiling temperature I don’t believe. The outdrive is almost full of lube, there isn’t as much open space as there is inside an engine block, so moisture won’t build up as much.

In the end it is probably all minimal anyway.

Agree with all you guys. Un opened engine oil and outdrive/lower unit gear lube (I have ZF V drives and use Dextron II /III ATF changing every 300 operating hours) should never be a problem! Even if the bottle has been opened and then the cap tightened I don't believe any moisture would get in regardless of where it is stored. Just a note = In order for any moisture to condense in any fluid the fluid has to be below the (dew point) of the ambient air the tank/bottle/can is sitting in. In our case, over winter, our fuel tanks (which are both vented to the atmosphere) are at least 10/20F above the dew point of the basically "dry" ambient air around the vessel. In summer it is a completely opposite situation, the fuel and tanks are 20/30F cooler than the ambient and that is when moisture will condense in the fuel. Moral of the story is keep the fuel tanks full in summer warm humid weather and dont worry too much over winter (depending on what winter is like where you are docked).
Last comment = The engine oil doesn't have to reach the boiling point of water , just 165/195F, that will cause the water in the engine lube oil to evaporate, not actually boil off. Remember the engine lube oil flows thru the cylinder heads and splashes on the cylinder liners from below as well and those surfaces are at much higher temps then the nominal oil temp in the oil sump. So, i am done rambling:) Hope you guys all have a Merry Christmas/Happy New Year and / or Happy Holidays!
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