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Does oil have a "use-by-date"?

896 views 6 replies 6 participants last post by  2WheelFun  
#1 ·
I have been using Motul 5100 every 6 months for my oil changes, and of the gallon, I always have a quart left over.... Now I have 2-3 years worth of leftover (not used) oil still in the bottles - can I blend them together and use it at my next oil change?