API (AMERICAN Petroleum Institute) expresses the performance of oil. ' S ' means it will be used in vehicles with spark PLUG ignition and the letter ' C ' means it will be used in vehicles with pressure ignition.

In API SJ / CF example, as ' S ' is the prominent letter, this means it is recommended to USE that oil in gasoline-powered vehicles. ' J ' letter after ' S ' indicates that the oil is for gasoline-powered VEHICLE class. This oil can CONVENIENTLY be used as CF class oil in diesel vehicles.

API (American Petroleum Institute) expresses the performance of oil. ' S ' means it will be used in vehicles with spark plug ignition and the letter ' C ' means it will be used in vehicles with pressure ignition.

In API SJ / CF example, as ' S ' is the prominent letter, this means it is recommended to use that oil in gasoline-powered vehicles. ' J ' letter after ' S ' indicates that the oil is for gasoline-powered vehicle class. This oil can conveniently be used as CF class oil in diesel vehicles.