dont use it, leave em original is my vote!!
and i wouldnt put that oil in an engine. if it had been stored in a controlled environment where the temperature has not fluctuated much or often, then it has a indefinite lifespan. the problem arises when oil sits in a garage, shed, an attic, or anywhere there are temperature swings daily and seasonal. temperature drop or cooling is what causes permanent thickening and waxes to form in mineral oil. 10, 20, or 30 years of daily, and seasonal temp swings will have broken down the oil makeup and viscosity. but sitting in a heated and air-conditioned environment, the oil would be more likely be very similar to "new".
there is a reason car and oil manufacturers call for x,*** miles OR X months change intervals. even a vehicle that isnt being driven, the oil still breaks down and thickens. oil that is subjected to freezing or near freezing temps are the worst victims, and need to be changed definitely once the weather breaks and is not dropping so low. oil sitting in a bottle is no different. if you plan on hoarding oil stashes, keep them in the house, or climate controlled somehow for long term storage. oil companies "shelf life" is not only marketing gimmick, there is some truth to it.
