Why would you drain out fresh synthetic oil ???? Run the oil at least 90 days, or whatever your normal interval is.....certainly the synthetic oil in there now is superior to the bulk cheap conventional oil the dealer uses. Any oil filter,even a cheap Fram, is fine for a 90 day interval.ahmed_wasim wrote:I don't know what kind of filter he used. I'll have an oil change by Nissan in a week or so