Old Oil??

I bought 2 Mule 1000s and they have been sitting awhile but that is not the question, the question is that they came with a case of ArticCat 10w-30 oil new? I am guessing that the oil is at least two or three years old and is it safe to use being new? It says it is safe for wet clutchs so should be fine in the 250ex and the AT right? Thanks