Aging of 2t oil?

[axolotl98]

Can anyone verify whether oil left into the main oil tank in the boat for 2 years is ok to use, or should it be thrown away?
It's more than 8liters and was thinking of topping it up with 2 newly bought liters of oil
Oil is fully synthetic Amsoil...

[Sequoiha]

I wouldnt use it, im sure it has seen many temp. changes in 2 years, its not worth the cost of a power head..