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Can 20-Year-Old Motor Oil Be Used in a New Car?
 
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Question:
Can 20-Year-Old Motor Oil Be Used in a New Car?
I have a case of Mobil 1 synthetic motor oil stored in my shed for at least 20 years. The rating on the bottle is API SG,SF/CC,CD. Can I still use it on my 2005 Acura EL? Will it damage the engine, seals or gaskets?
-- Kenneth Lee, Blaine, WA
Answer:
No, we do not recommend the use of this oil in your engine because 2005 year model cars need an API SM oil specification.  Additionally, since stored for such a long time, the engine oil may have lost some of its properties. Also see our related answer on oil shelf life.
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