Originally Posted By: G35_TX
Again, 2007 350Z does not need it. The HR engine is not the same engine as the Maxima of that year. The only time Nissan started recommending the Ester oils was in the G37 and 370z and since changed their manuals to all the cars showing it when they do not need it as they don't have the system the G37 or 370z has in place.
I have had every variation of the VQ engine since 1995 when it first came out. They DO NOT NEED Nissan's ESTER oil or any ESTER oil period. Sure they can recommend it, so they can make more money, but it's not needed in the other engines other than the 3.7L.
I never said the OP had to use it. I merely suggested he consider using an oil equivalent to it since that is the trend that Nissan is moving towards for their VQ35 engines.
It is correct that none of the Nissan engines need the ester oil. In fact, even in the 370z's owners manual, it merely states Genuine Nissan Ester Oil is recommended. However, the wording in the manual of the 370z is no different than the wording in my 2010 Altima's owners manual when it comes to the ester oil.
There is a lot of technical info on the internet explaining the benefits of the ester oil and why it is beneficial. A lot of people are running conventional oil in these engines without issues and who knows, those engines may turn out just fine in the end. Regardless, I just wanted to make sure the OP is aware of the ongoing Ester Oil situation, even if his engine may not be back-speced for it at this time.