use of synthetic motor oil? good -or-bad on 2006 Infiniti G35

Mt mechanic recommends it... just wondering

Asked by for the 2006 Infiniti G35
Check oil fill cap for spec. or owners manual.
1 more answer
i believe that car calls for it. my belief is there is nothing better for a car than oil cahnges every 3k miles,syn will let you go like triple the mileage.but is that really good? its your call