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rotorwrench · 02-02-2019, 02:16 PM

If it is still sealed in it's original packaging, ie can or plastic bottle, then it should be fine for a run and possibly as good as the day it was put in the package. There are no unstable additives for motor oil that I'm aware of that could cause any problem with basic lubrication. Aftermarket oil additives are a different story depending on what it was intended to do and its chemical makeup.

02-02-2019, 02:16 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: Can NOS oil additives go bad If it is still sealed in it's original packaging, ie can or plastic bottle, then it should be fine for a run and possibly as good as the day it was put in the package. There are no unstable additives for motor oil that I'm aware of that could cause any problem with basic lubrication. Aftermarket oil additives are a different story depending on what it was intended to do and its chemical makeup.