If you are just changing the oil , clean the plug , hand thread it in and snug it down . I have never TQ'd it down anytime I have changed the oil . If i were to guess I would say 25-30 FT pounds . But like I said most guys just snug it with a wrench and give it a good shot of elbow grease to finalize it .
Welcome to RF by the way , sorry I lost my manors