Can I use API SN instead of API SJ?

Can I use API SN instead of API SJ? The American Petroleum Institute, API, is a U.S.A trade association for the oil and natural gas industry. For example, if we have an oil with specification SN, it can also be used for vehicles which request API SM, SL and SJ; it is backward compatible. Can … Continue reading Can I use API SN instead of API SJ?