Normally speaking, if it is unopened, it can be used if it expires within one year. But according to the date you provided, others say it is fine. Do you still dare to use it? It definitely can't be used. Think about it, since he has covered the production date with something, what does this prove? It proves that his stuff is shady. It has been expired for so many years, and the quality of the engine oil is no longer a problem. You'd better go to him and return the goods, but don't settle the score, impulsiveness is the devil...