We keep hundreds of quarts and gallon jugs of oil in the shop.....some for a couple of years before we get a application for that particular product/oil.....never an issue.....I'm superstitious though and shake each one before I pour it in
Not sure, but I think I may have read on Mobil 1's web site that their oil has a 5-year shelf life (additives break down over time). Don't quote me, though, because it's been a while since I've been to their site. I used to visit www.Mobil1.com a lot when I was still a fan of their oil, before I learned better