Nissan Ester Oil is part synthetic or full syenthic

Originally Posted by IDZRVIT

From the Z service manual:

"FOR NORTH AMERICA : Engine Oil Recommendation:
NISSAN recommends the use of an energy conserving oil in order to improve fuel economy.
Select only engine oils that meet the American Petroleum Institute (API) certification and International Lubricant
Standardization and Approval Committee (ILSAC) certification and SAE viscosity standard. These oils
have the API certification mark on the front of the container. Oils which do not have the specified quality label
should not be used as they could cause engine damage."

I highly doubt Nissan engineers would recommend a schedule 2 maintenance interval that would push the envelope under normal driving using dino oil.