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The motor oil I'm using in my cars has been stored in outside storage buildings where the temperatures vary from 0*F in the winter to 100*+F in the summer and most of it is over 10 years old with some of it being over 20 years old. I also still have about 20 cases on hand, so some of it will probably be well over 25 years old when I finally use it. The oil I'm using in my '88 Escort that's got 516K+ miles on it is probably at least 25 years old. The oil I'm now using in my '97 Escort wagon is the same oil I had on hand and started using in it when I bought it new, so that oil is at least 14 years old and I still have 2 or 3 cases of it. I guess you know my thoughts on shelf life and temperature variations. lol
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