Which is best engine oil for my car, suzuki motors recommended 10w40 SM OR SG I don’t understand plz guide me
What more do you need to know ? Just use what is recommended .
SM/SG refers to the category of the oil set by the API. SP and SN are the most current, and they are backwards compatible, so since your vehicle requires SM or SG, you can use SN. More information about API here: API | Oil Categories