I don't believe oil has a shelf life. Another domestic downsizing and I came across this stuff, which I found 4L of in a chucked out cupboard a few years ago. SG "equivalent" 20W50, 1985 by the code, so a contemporary of the car. Don't know when exactly, but I think thats my next oil fill, unless I find a reason not too. (Apologies for the image rotation, which happened on upload and is a new "feature".) Windows just keeps getting better.