We have a guy here running forty year old oil in a Z of the same vintage.
Now, if someone would risk ancient oil in a now valuable ancient Z, how much risk do you think would be involved in using oil that might be as much as five years old?
I've personally used oil that was probably a decade old with no ill effects to report.
There is nothing wrong with the quart you have sitting on the shelf.
Use it without hesitation. Shake it up if it makes you feel better as some here like to do.