[M.D. Holloway]

True, the oil will last awhile fer sure, synthetic even longer. But that is not you major concern. Back in 2004, the API had passed the SM specification, up until it was SJ & SL oil specification classification which superseded previous specs.

These specs take into account viscosity, foaming, Phosphorus, homogeneity and miscibility, volatility, sludge formation just to mention a few. Every few years the specs change and get tighter according to several different factors. New engines really have to have the latest oil technology. Will it mess you up if it doesn't have it in it? Most likely not. I think you are safe.